diff --git a/dev/prod/src/platform-dev.ts b/dev/prod/src/platform-dev.ts
index 3c89fbbea3..2805e90d85 100644
--- a/dev/prod/src/platform-dev.ts
+++ b/dev/prod/src/platform-dev.ts
@@ -13,11 +13,11 @@
 // limitations under the License.
 //
 
-import { addLocation } from '@hcengineering/platform'
+import { devModelId } from '@hcengineering/devmodel'
+import { PresentationClientHook } from '@hcengineering/devmodel-resources'
 import login from '@hcengineering/login'
-import { setMetadata } from '@hcengineering/platform'
-import devmodel, { devModelId } from '@hcengineering/devmodel'
-import client from '@hcengineering/client'
+import { addLocation, setMetadata } from '@hcengineering/platform'
+import presentation from '@hcengineering/presentation'
 
 export function configurePlatformDevServer() {  
   console.log('Use Endpoint override:', process.env.LOGIN_ENDPOINT)
@@ -28,6 +28,6 @@ export function configurePlatformDevServer() {
 }
 
 function enableDevModel() {
-  setMetadata(client.metadata.ClientHook, devmodel.hook.Hook)
+  setMetadata(presentation.metadata.ClientHook, new PresentationClientHook())
   addLocation(devModelId, () => import(/* webpackChunkName: "devmodel" */ '@hcengineering/devmodel-resources'))
 }
diff --git a/packages/core/src/__tests__/client.test.ts b/packages/core/src/__tests__/client.test.ts
index 850a3dd6f1..f6cf6d466d 100644
--- a/packages/core/src/__tests__/client.test.ts
+++ b/packages/core/src/__tests__/client.test.ts
@@ -122,9 +122,6 @@ describe('client', () => {
         clean: async (domain: Domain, docs: Ref<Doc>[]) => {},
         loadModel: async (last: Timestamp) => clone(txes),
         getAccount: async () => null as unknown as Account,
-        measure: async () => {
-          return async () => ({ time: 0, serverTime: 0 })
-        },
         sendForceClose: async () => {}
       }
     }
diff --git a/packages/core/src/__tests__/connection.ts b/packages/core/src/__tests__/connection.ts
index a79354f6bb..e38a65cae6 100644
--- a/packages/core/src/__tests__/connection.ts
+++ b/packages/core/src/__tests__/connection.ts
@@ -73,7 +73,6 @@ export async function connect (handler: (tx: Tx) => void): Promise<ClientConnect
     clean: async (domain: Domain, docs: Ref<Doc>[]) => {},
     loadModel: async (last: Timestamp) => txes,
     getAccount: async () => null as unknown as Account,
-    measure: async () => async () => ({ time: 0, serverTime: 0 }),
     sendForceClose: async () => {}
   }
 }
diff --git a/packages/core/src/client.ts b/packages/core/src/client.ts
index ebe72fd441..148b33ddc0 100644
--- a/packages/core/src/client.ts
+++ b/packages/core/src/client.ts
@@ -47,17 +47,10 @@ export interface Client extends Storage, FulltextStorage {
   close: () => Promise<void>
 }
 
-export type MeasureDoneOperation = () => Promise<{ time: number, serverTime: number }>
-
-export interface MeasureClient extends Client {
-  // Will perform on server operation measure and will return a local client time and on server time
-  measure: (operationName: string) => Promise<MeasureDoneOperation>
-}
-
 /**
  * @public
  */
-export interface AccountClient extends MeasureClient {
+export interface AccountClient extends Client {
   getAccount: () => Promise<Account>
 }
 
@@ -97,11 +90,9 @@ export interface ClientConnection extends Storage, FulltextStorage, BackupClient
   // If hash is passed, will return LoadModelResponse
   loadModel: (last: Timestamp, hash?: string) => Promise<Tx[] | LoadModelResponse>
   getAccount: () => Promise<Account>
-
-  measure: (operationName: string) => Promise<MeasureDoneOperation>
 }
 
-class ClientImpl implements AccountClient, BackupClient, MeasureClient {
+class ClientImpl implements AccountClient, BackupClient {
   notify?: (...tx: Tx[]) => void
   hierarchy!: Hierarchy
   model!: ModelDb
@@ -163,10 +154,6 @@ class ClientImpl implements AccountClient, BackupClient, MeasureClient {
     return result
   }
 
-  async measure (operationName: string): Promise<MeasureDoneOperation> {
-    return await this.conn.measure(operationName)
-  }
-
   async updateFromRemote (...tx: Tx[]): Promise<void> {
     for (const t of tx) {
       try {
diff --git a/packages/core/src/operations.ts b/packages/core/src/operations.ts
index ff8e7406f5..f6a0b7e258 100644
--- a/packages/core/src/operations.ts
+++ b/packages/core/src/operations.ts
@@ -312,8 +312,8 @@ export class TxOperations implements Omit<Client, 'notify'> {
     return this.removeDoc(doc._class, doc.space, doc._id)
   }
 
-  apply (scope: string): ApplyOperations {
-    return new ApplyOperations(this, scope)
+  apply (scope: string, measure?: string): ApplyOperations {
+    return new ApplyOperations(this, scope, measure)
   }
 
   async diffUpdate<T extends Doc = Doc>(
@@ -423,6 +423,12 @@ export class TxOperations implements Omit<Client, 'notify'> {
   }
 }
 
+export interface CommitResult {
+  result: boolean
+  time: number
+  serverTime: number
+}
+
 /**
  * @public
  *
@@ -436,7 +442,8 @@ export class ApplyOperations extends TxOperations {
   notMatches: DocumentClassQuery<Doc>[] = []
   constructor (
     readonly ops: TxOperations,
-    readonly scope: string
+    readonly scope: string,
+    readonly measureName?: string
   ) {
     const txClient: Client = {
       getHierarchy: () => ops.client.getHierarchy(),
@@ -465,23 +472,28 @@ export class ApplyOperations extends TxOperations {
     return this
   }
 
-  async commit (notify: boolean = true, extraNotify: Ref<Class<Doc>>[] = []): Promise<boolean> {
+  async commit (notify: boolean = true, extraNotify: Ref<Class<Doc>>[] = []): Promise<CommitResult> {
     if (this.txes.length > 0) {
-      return (
-        await ((await this.ops.tx(
-          this.ops.txFactory.createTxApplyIf(
-            core.space.Tx,
-            this.scope,
-            this.matches,
-            this.notMatches,
-            this.txes,
-            notify,
-            extraNotify
-          )
-        )) as Promise<TxApplyResult>)
-      ).success
+      const st = Date.now()
+      const result = await ((await this.ops.tx(
+        this.ops.txFactory.createTxApplyIf(
+          core.space.Tx,
+          this.scope,
+          this.matches,
+          this.notMatches,
+          this.txes,
+          this.measureName,
+          notify,
+          extraNotify
+        )
+      )) as Promise<TxApplyResult>)
+      return {
+        result: result.success,
+        time: Date.now() - st,
+        serverTime: result.serverTime
+      }
     }
-    return true
+    return { result: true, time: 0, serverTime: 0 }
   }
 }
 
diff --git a/packages/core/src/server.ts b/packages/core/src/server.ts
index f6456af0a5..1aea148b20 100644
--- a/packages/core/src/server.ts
+++ b/packages/core/src/server.ts
@@ -33,14 +33,15 @@ export interface StorageIterator {
   close: (ctx: MeasureContext) => Promise<void>
 }
 
+export type BroadcastTargets = Record<string, (tx: Tx) => string[] | undefined>
+
 export interface SessionOperationContext {
   ctx: MeasureContext
   // A parts of derived data to deal with after operation will be complete
   derived: {
-    derived: Tx[]
-    target?: string[]
-  }[]
-
+    txes: Tx[]
+    targets: BroadcastTargets // A set of broadcast filters if required
+  }
   with: <T>(
     name: string,
     params: ParamsType,
diff --git a/packages/core/src/tx.ts b/packages/core/src/tx.ts
index f0802bd0a0..d14d85704c 100644
--- a/packages/core/src/tx.ts
+++ b/packages/core/src/tx.ts
@@ -28,13 +28,13 @@ import type {
   Space,
   Timestamp
 } from './classes'
+import { clone } from './clone'
 import core from './component'
 import { setObjectValue } from './objvalue'
 import { _getOperator } from './operator'
 import { _toDoc } from './proxy'
 import type { DocumentQuery, TxResult } from './storage'
 import { generateId } from './utils'
-import { clone } from './clone'
 
 /**
  * @public
@@ -137,10 +137,14 @@ export interface TxApplyIf extends Tx {
 
   // If passed, will send WorkspaceEvent.BulkUpdate event with list of classes to update
   extraNotify?: Ref<Class<Doc>>[]
+
+  // If defined will go into a separate measure section
+  measureName?: string
 }
 
 export interface TxApplyResult {
   success: boolean
+  serverTime: number
 }
 
 /**
@@ -618,6 +622,7 @@ export class TxFactory {
     match: DocumentClassQuery<Doc>[],
     notMatch: DocumentClassQuery<Doc>[],
     txes: TxCUD<Doc>[],
+    measureName: string | undefined,
     notify: boolean = true,
     extraNotify: Ref<Class<Doc>>[] = [],
     modifiedOn?: Timestamp,
@@ -634,6 +639,7 @@ export class TxFactory {
       match,
       notMatch,
       txes,
+      measureName,
       notify,
       extraNotify
     }
diff --git a/packages/presentation/src/pipeline.ts b/packages/presentation/src/pipeline.ts
index 13292fea32..79f3fe6663 100644
--- a/packages/presentation/src/pipeline.ts
+++ b/packages/presentation/src/pipeline.ts
@@ -8,8 +8,6 @@ import {
   type FindOptions,
   type FindResult,
   type Hierarchy,
-  type MeasureClient,
-  type MeasureDoneOperation,
   type ModelDb,
   type Ref,
   type SearchOptions,
@@ -65,7 +63,7 @@ export type PresentationMiddlewareCreator = (client: Client, next?: Presentation
 /**
  * @public
  */
-export interface PresentationPipeline extends MeasureClient, Exclude<PresentationMiddleware, 'next'> {
+export interface PresentationPipeline extends Client, Exclude<PresentationMiddleware, 'next'> {
   close: () => Promise<void>
 }
 
@@ -75,7 +73,7 @@ export interface PresentationPipeline extends MeasureClient, Exclude<Presentatio
 export class PresentationPipelineImpl implements PresentationPipeline {
   private head: PresentationMiddleware | undefined
 
-  private constructor (readonly client: MeasureClient) {}
+  private constructor (readonly client: Client) {}
 
   getHierarchy (): Hierarchy {
     return this.client.getHierarchy()
@@ -89,11 +87,7 @@ export class PresentationPipelineImpl implements PresentationPipeline {
     await this.head?.notifyTx(...tx)
   }
 
-  async measure (operationName: string): Promise<MeasureDoneOperation> {
-    return await this.client.measure(operationName)
-  }
-
-  static create (client: MeasureClient, constructors: PresentationMiddlewareCreator[]): PresentationPipeline {
+  static create (client: Client, constructors: PresentationMiddlewareCreator[]): PresentationPipeline {
     const pipeline = new PresentationPipelineImpl(client)
     pipeline.head = pipeline.buildChain(constructors)
     return pipeline
diff --git a/packages/presentation/src/plugin.ts b/packages/presentation/src/plugin.ts
index 3dd6d63552..d4a7fd5f8b 100644
--- a/packages/presentation/src/plugin.ts
+++ b/packages/presentation/src/plugin.ts
@@ -14,26 +14,64 @@
 // limitations under the License.
 //
 
-import { type Mixin, type Class, type Ref } from '@hcengineering/core'
+import {
+  type Class,
+  type Client,
+  type Doc,
+  type DocumentQuery,
+  type FindOptions,
+  type FindResult,
+  type Mixin,
+  type Ref,
+  type SearchOptions,
+  type SearchQuery,
+  type SearchResult,
+  type Tx,
+  type TxResult,
+  type WithLookup
+} from '@hcengineering/core'
 import type { Asset, IntlString, Metadata, Plugin, StatusCode } from '@hcengineering/platform'
 import { plugin } from '@hcengineering/platform'
 import { type ComponentExtensionId } from '@hcengineering/ui'
 import { type PresentationMiddlewareFactory } from './pipeline'
+import type { PreviewConfig } from './preview'
 import {
   type ComponentPointExtension,
-  type DocRules,
   type DocCreateExtension,
+  type DocRules,
   type FilePreviewExtension,
-  type ObjectSearchCategory,
-  type InstantTransactions
+  type InstantTransactions,
+  type ObjectSearchCategory
 } from './types'
-import type { PreviewConfig } from './preview'
 
 /**
  * @public
  */
 export const presentationId = 'presentation' as Plugin
 
+/**
+ * @public
+ */
+export interface ClientHook {
+  findAll: <T extends Doc>(
+    client: Client,
+    _class: Ref<Class<T>>,
+    query: DocumentQuery<T>,
+    options?: FindOptions<T>
+  ) => Promise<FindResult<T>>
+
+  findOne: <T extends Doc>(
+    client: Client,
+    _class: Ref<Class<T>>,
+    query: DocumentQuery<T>,
+    options?: FindOptions<T>
+  ) => Promise<WithLookup<T> | undefined>
+
+  tx: (client: Client, tx: Tx) => Promise<TxResult>
+
+  searchFulltext: (client: Client, query: SearchQuery, options: SearchOptions) => Promise<SearchResult>
+}
+
 export default plugin(presentationId, {
   class: {
     ObjectSearchCategory: '' as Ref<Class<ObjectSearchCategory>>,
@@ -95,7 +133,8 @@ export default plugin(presentationId, {
     CollaboratorApiUrl: '' as Metadata<string>,
     Token: '' as Metadata<string>,
     FrontUrl: '' as Asset,
-    PreviewConfig: '' as Metadata<PreviewConfig | undefined>
+    PreviewConfig: '' as Metadata<PreviewConfig | undefined>,
+    ClientHook: '' as Metadata<ClientHook>
   },
   status: {
     FileTooLarge: '' as StatusCode
diff --git a/packages/presentation/src/utils.ts b/packages/presentation/src/utils.ts
index a454bf12b0..37e195e6d3 100644
--- a/packages/presentation/src/utils.ts
+++ b/packages/presentation/src/utils.ts
@@ -33,8 +33,6 @@ import core, {
   type FindOptions,
   type FindResult,
   type Hierarchy,
-  type MeasureClient,
-  type MeasureDoneOperation,
   type Mixin,
   type Obj,
   type Blob as PlatformBlob,
@@ -65,7 +63,7 @@ export { reduceCalls } from '@hcengineering/core'
 
 let liveQuery: LQ
 let rawLiveQuery: LQ
-let client: TxOperations & MeasureClient & OptimisticTxes
+let client: TxOperations & Client & OptimisticTxes
 let pipeline: PresentationPipeline
 
 const txListeners: Array<(...tx: Tx[]) => void> = []
@@ -95,16 +93,15 @@ export interface OptimisticTxes {
   pendingCreatedDocs: Writable<Record<Ref<Doc>, boolean>>
 }
 
-class UIClient extends TxOperations implements Client, MeasureClient, OptimisticTxes {
+class UIClient extends TxOperations implements Client, OptimisticTxes {
+  hook = getMetadata(plugin.metadata.ClientHook)
   constructor (
-    client: MeasureClient,
+    client: Client,
     private readonly liveQuery: Client
   ) {
     super(client, getCurrentAccount()._id)
   }
 
-  afterMeasure: Tx[] = []
-  measureOp?: MeasureDoneOperation
   protected pendingTxes = new Set<Ref<Tx>>()
   protected _pendingCreatedDocs = writable<Record<Ref<Doc>, boolean>>({})
 
@@ -113,34 +110,30 @@ class UIClient extends TxOperations implements Client, MeasureClient, Optimistic
   }
 
   async doNotify (...tx: Tx[]): Promise<void> {
-    if (this.measureOp !== undefined) {
-      this.afterMeasure.push(...tx)
-    } else {
-      const pending = get(this._pendingCreatedDocs)
-      let pendingUpdated = false
-      tx.forEach((t) => {
-        if (this.pendingTxes.has(t._id)) {
-          this.pendingTxes.delete(t._id)
+    const pending = get(this._pendingCreatedDocs)
+    let pendingUpdated = false
+    tx.forEach((t) => {
+      if (this.pendingTxes.has(t._id)) {
+        this.pendingTxes.delete(t._id)
 
-          // Only CUD tx can be pending now
-          const innerTx = TxProcessor.extractTx(t) as TxCUD<Doc>
+        // Only CUD tx can be pending now
+        const innerTx = TxProcessor.extractTx(t) as TxCUD<Doc>
 
-          if (innerTx._class === core.class.TxCreateDoc) {
-            // eslint-disable-next-line @typescript-eslint/no-dynamic-delete
-            delete pending[innerTx.objectId]
-            pendingUpdated = true
-          }
+        if (innerTx._class === core.class.TxCreateDoc) {
+          // eslint-disable-next-line @typescript-eslint/no-dynamic-delete
+          delete pending[innerTx.objectId]
+          pendingUpdated = true
         }
-      })
-      if (pendingUpdated) {
-        this._pendingCreatedDocs.set(pending)
       }
-
-      // We still want to notify about all transactions because there might be queries created after
-      // the early applied transaction
-      // For old queries there's a check anyway that prevents the same document from being added twice
-      await this.provideNotify(...tx)
+    })
+    if (pendingUpdated) {
+      this._pendingCreatedDocs.set(pending)
     }
+
+    // We still want to notify about all transactions because there might be queries created after
+    // the early applied transaction
+    // For old queries there's a check anyway that prevents the same document from being added twice
+    await this.provideNotify(...tx)
   }
 
   private async provideNotify (...tx: Tx[]): Promise<void> {
@@ -165,6 +158,9 @@ class UIClient extends TxOperations implements Client, MeasureClient, Optimistic
     query: DocumentQuery<T>,
     options?: FindOptions<T>
   ): Promise<FindResult<T>> {
+    if (this.hook !== undefined) {
+      return await this.hook.findAll(this.liveQuery, _class, query, options)
+    }
     return await this.liveQuery.findAll(_class, query, options)
   }
 
@@ -173,12 +169,17 @@ class UIClient extends TxOperations implements Client, MeasureClient, Optimistic
     query: DocumentQuery<T>,
     options?: FindOptions<T>
   ): Promise<WithLookup<T> | undefined> {
+    if (this.hook !== undefined) {
+      return await this.hook.findOne(this.liveQuery, _class, query, options)
+    }
     return await this.liveQuery.findOne(_class, query, options)
   }
 
   override async tx (tx: Tx): Promise<TxResult> {
     void this.notifyEarly(tx)
-
+    if (this.hook !== undefined) {
+      return await this.hook.tx(this.client, tx)
+    }
     return await this.client.tx(tx)
   }
 
@@ -221,39 +222,24 @@ class UIClient extends TxOperations implements Client, MeasureClient, Optimistic
   }
 
   async searchFulltext (query: SearchQuery, options: SearchOptions): Promise<SearchResult> {
-    return await this.client.searchFulltext(query, options)
-  }
-
-  async measure (operationName: string): Promise<MeasureDoneOperation> {
-    // return await (this.client as MeasureClient).measure(operationName)
-    const mop = await (this.client as MeasureClient).measure(operationName)
-    this.measureOp = mop
-    return async () => {
-      const result = await mop()
-      this.measureOp = undefined
-      if (this.afterMeasure.length > 0) {
-        const txes = this.afterMeasure
-        this.afterMeasure = []
-        for (const tx of txes) {
-          await this.doNotify(tx)
-        }
-      }
-      return result
+    if (this.hook !== undefined) {
+      return await this.hook.searchFulltext(this.client, query, options)
     }
+    return await this.client.searchFulltext(query, options)
   }
 }
 
 /**
  * @public
  */
-export function getClient (): TxOperations & MeasureClient & OptimisticTxes {
+export function getClient (): TxOperations & Client & OptimisticTxes {
   return client
 }
 
 /**
  * @public
  */
-export async function setClient (_client: MeasureClient): Promise<void> {
+export async function setClient (_client: Client): Promise<void> {
   if (liveQuery !== undefined) {
     await liveQuery.close()
   }
@@ -276,6 +262,7 @@ export async function setClient (_client: MeasureClient): Promise<void> {
   liveQuery = new LQ(pipeline)
 
   const uiClient = new UIClient(pipeline, liveQuery)
+
   client = uiClient
 
   _client.notify = (...tx: Tx[]) => {
@@ -285,7 +272,6 @@ export async function setClient (_client: MeasureClient): Promise<void> {
     await refreshClient(true)
   }
 }
-
 /**
  * @public
  */
diff --git a/packages/query/src/__tests__/connection.ts b/packages/query/src/__tests__/connection.ts
index 8686246ea1..8ce3b5da53 100644
--- a/packages/query/src/__tests__/connection.ts
+++ b/packages/query/src/__tests__/connection.ts
@@ -98,7 +98,6 @@ FulltextStorage & {
     searchFulltext: async (query: SearchQuery, options: SearchOptions): Promise<SearchResult> => {
       return { docs: [] }
     },
-    measure: async () => async () => ({ time: 0, serverTime: 0 }),
     sendForceClose: async () => {}
   }
 }
diff --git a/plugins/chunter-resources/src/components/DirectIcon.svelte b/plugins/chunter-resources/src/components/DirectIcon.svelte
index b632445d6e..fb09084b17 100644
--- a/plugins/chunter-resources/src/components/DirectIcon.svelte
+++ b/plugins/chunter-resources/src/components/DirectIcon.svelte
@@ -14,12 +14,12 @@
 -->
 <script lang="ts">
   import { DirectMessage } from '@hcengineering/chunter'
-  import { Avatar, CombineAvatars, personAccountByIdStore } from '@hcengineering/contact-resources'
-  import { Icon, IconSize } from '@hcengineering/ui'
   import contact, { Person, PersonAccount } from '@hcengineering/contact'
-  import { classIcon } from '@hcengineering/view-resources'
-  import { getClient } from '@hcengineering/presentation'
+  import { Avatar, CombineAvatars, personAccountByIdStore, personByIdStore } from '@hcengineering/contact-resources'
   import { Account, IdMap } from '@hcengineering/core'
+  import { getClient } from '@hcengineering/presentation'
+  import { Icon, IconSize } from '@hcengineering/ui'
+  import { classIcon } from '@hcengineering/view-resources'
 
   import chunter from '../plugin'
   import { getDmPersons } from '../utils'
@@ -33,10 +33,11 @@
 
   let persons: Person[] = []
 
-  $: value &&
-    getDmPersons(client, value).then((res) => {
+  $: if (value !== undefined) {
+    void getDmPersons(client, value, $personByIdStore).then((res) => {
       persons = res
     })
+  }
 
   let avatarSize = size
 
diff --git a/plugins/chunter-resources/src/components/chat-message/ChatMessageInput.svelte b/plugins/chunter-resources/src/components/chat-message/ChatMessageInput.svelte
index 4b2bcb3c97..d89ed14896 100644
--- a/plugins/chunter-resources/src/components/chat-message/ChatMessageInput.svelte
+++ b/plugins/chunter-resources/src/components/chat-message/ChatMessageInput.svelte
@@ -13,15 +13,15 @@
 // limitations under the License.
 -->
 <script lang="ts">
+  import activity, { ActivityMessage } from '@hcengineering/activity'
   import { Analytics } from '@hcengineering/analytics'
-  import { createEventDispatcher } from 'svelte'
   import { AttachmentRefInput } from '@hcengineering/attachment-resources'
-  import { Class, Doc, generateId, getCurrentAccount, Ref } from '@hcengineering/core'
-  import { createQuery, DraftController, draftsStore, getClient, isSpace } from '@hcengineering/presentation'
   import chunter, { ChatMessage, ThreadMessage } from '@hcengineering/chunter'
   import { PersonAccount } from '@hcengineering/contact'
-  import activity, { ActivityMessage } from '@hcengineering/activity'
+  import { Class, Doc, generateId, getCurrentAccount, Ref, type CommitResult } from '@hcengineering/core'
+  import { createQuery, DraftController, draftsStore, getClient, isSpace } from '@hcengineering/presentation'
   import { EmptyMarkup } from '@hcengineering/text-editor'
+  import { createEventDispatcher } from 'svelte'
 
   export let object: Doc
   export let chatMessage: ChatMessage | undefined = undefined
@@ -100,32 +100,20 @@
   }
 
   async function handleCreate (event: CustomEvent, _id: Ref<ChatMessage>): Promise<void> {
-    const doneOp = getClient().measure(`chunter.create.${_class} ${object._class}`)
     try {
-      await createMessage(event, _id)
+      const res = await createMessage(event, _id, `chunter.create.${_class} ${object._class}`)
 
-      const d1 = Date.now()
-      void (await doneOp)().then((res) => {
-        console.log(`create.${_class} measure`, res, Date.now() - d1)
-      })
+      console.log(`create.${_class} measure`, res.serverTime, res.time)
     } catch (err: any) {
-      void (await doneOp)()
       Analytics.handleError(err)
       console.error(err)
     }
   }
 
   async function handleEdit (event: CustomEvent): Promise<void> {
-    const doneOp = getClient().measure(`chunter.edit.${_class} ${object._class}`)
     try {
       await editMessage(event)
-
-      const d1 = Date.now()
-      void (await doneOp)().then((res) => {
-        console.log(`edit.${_class} measure`, res, Date.now() - d1)
-      })
     } catch (err: any) {
-      void (await doneOp)()
       Analytics.handleError(err)
       console.error(err)
     }
@@ -148,9 +136,9 @@
     loading = false
   }
 
-  async function createMessage (event: CustomEvent, _id: Ref<ChatMessage>): Promise<void> {
+  async function createMessage (event: CustomEvent, _id: Ref<ChatMessage>, msg: string): Promise<CommitResult> {
     const { message, attachments } = event.detail
-    const operations = client.apply(_id)
+    const operations = client.apply(_id, msg)
 
     if (_class === chunter.class.ThreadMessage) {
       const parentMessage = object as ActivityMessage
@@ -188,7 +176,7 @@
         _id
       )
     }
-    await operations.commit()
+    return await operations.commit()
   }
 
   async function editMessage (event: CustomEvent): Promise<void> {
diff --git a/plugins/chunter-resources/src/components/chat/navigator/ChatNavGroup.svelte b/plugins/chunter-resources/src/components/chat/navigator/ChatNavGroup.svelte
index 9412574952..f2589af348 100644
--- a/plugins/chunter-resources/src/components/chat/navigator/ChatNavGroup.svelte
+++ b/plugins/chunter-resources/src/components/chat/navigator/ChatNavGroup.svelte
@@ -13,17 +13,17 @@
 // limitations under the License.
 -->
 <script lang="ts">
-  import { Class, Doc, getCurrentAccount, groupByArray, Ref, SortingOrder } from '@hcengineering/core'
-  import notification, { DocNotifyContext } from '@hcengineering/notification'
-  import { createQuery, getClient, LiveQuery } from '@hcengineering/presentation'
   import activity from '@hcengineering/activity'
-  import { IntlString } from '@hcengineering/platform'
-  import { Action } from '@hcengineering/ui'
+  import { Class, Doc, getCurrentAccount, groupByArray, reduceCalls, Ref, SortingOrder } from '@hcengineering/core'
+  import notification, { DocNotifyContext } from '@hcengineering/notification'
   import { InboxNotificationsClientImpl } from '@hcengineering/notification-resources'
+  import { IntlString } from '@hcengineering/platform'
+  import { createQuery, getClient, LiveQuery } from '@hcengineering/presentation'
+  import { Action } from '@hcengineering/ui'
 
+  import chunter from '../../../plugin'
   import { ChatGroup, ChatNavGroupModel } from '../types'
   import ChatNavSection from './ChatNavSection.svelte'
-  import chunter from '../../../plugin'
 
   export let object: Doc | undefined
   export let model: ChatNavGroupModel
@@ -68,7 +68,11 @@
 
   $: loadObjects(contexts)
 
-  $: void getSections(objectsByClass, model, shouldPushObject ? object : undefined).then((res) => {
+  $: pushObj = shouldPushObject ? object : undefined
+
+  const getPushObj = () => pushObj as Doc
+
+  $: void getSections(objectsByClass, model, pushObj, getPushObj, (res) => {
     sections = res
   })
 
@@ -112,63 +116,68 @@
     return 'activity'
   }
 
-  async function getSections (
-    objectsByClass: Map<Ref<Class<Doc>>, Doc[]>,
-    model: ChatNavGroupModel,
-    object: Doc | undefined
-  ): Promise<Section[]> {
-    const result: Section[] = []
+  const getSections = reduceCalls(
+    async (
+      objectsByClass: Map<Ref<Class<Doc>>, Doc[]>,
+      model: ChatNavGroupModel,
+      object: { _id: Doc['_id'], _class: Doc['_class'] } | undefined,
+      getPushObj: () => Doc,
+      handler: (result: Section[]) => void
+    ): Promise<void> => {
+      const result: Section[] = []
 
-    if (!model.wrap) {
-      result.push({
-        id: model.id,
-        objects: Array.from(objectsByClass.values()).flat(),
-        label: model.label ?? chunter.string.Channels
-      })
+      if (!model.wrap) {
+        result.push({
+          id: model.id,
+          objects: Array.from(objectsByClass.values()).flat(),
+          label: model.label ?? chunter.string.Channels
+        })
 
-      return result
-    }
-
-    let isObjectPushed = false
-
-    if (
-      Array.from(objectsByClass.values())
-        .flat()
-        .some((o) => o._id === object?._id)
-    ) {
-      isObjectPushed = true
-    }
-
-    for (const [_class, objects] of objectsByClass.entries()) {
-      const clazz = hierarchy.getClass(_class)
-      const sectionObjects = [...objects]
-
-      if (object && _class === object._class && !objects.some(({ _id }) => _id === object._id)) {
-        isObjectPushed = true
-        sectionObjects.push(object)
+        handler(result)
+        return
       }
 
-      result.push({
-        id: _class,
-        _class,
-        objects: sectionObjects,
-        label: clazz.pluralLabel ?? clazz.label
-      })
+      let isObjectPushed = false
+
+      if (
+        Array.from(objectsByClass.values())
+          .flat()
+          .some((o) => o._id === object?._id)
+      ) {
+        isObjectPushed = true
+      }
+
+      for (const [_class, objects] of objectsByClass.entries()) {
+        const clazz = hierarchy.getClass(_class)
+        const sectionObjects = [...objects]
+
+        if (object !== undefined && _class === object._class && !objects.some(({ _id }) => _id === object._id)) {
+          isObjectPushed = true
+          sectionObjects.push(getPushObj())
+        }
+
+        result.push({
+          id: _class,
+          _class,
+          objects: sectionObjects,
+          label: clazz.pluralLabel ?? clazz.label
+        })
+      }
+
+      if (!isObjectPushed && object !== undefined) {
+        const clazz = hierarchy.getClass(object._class)
+
+        result.push({
+          id: object._id,
+          _class: object._class,
+          objects: [getPushObj()],
+          label: clazz.pluralLabel ?? clazz.label
+        })
+      }
+
+      handler(result.sort((s1, s2) => s1.label.localeCompare(s2.label)))
     }
-
-    if (!isObjectPushed && object) {
-      const clazz = hierarchy.getClass(object._class)
-
-      result.push({
-        id: object._id,
-        _class: object._class,
-        objects: [object],
-        label: clazz.pluralLabel ?? clazz.label
-      })
-    }
-
-    return result.sort((s1, s2) => s1.label.localeCompare(s2.label))
-  }
+  )
 
   function getSectionActions (section: Section, contexts: DocNotifyContext[]): Action[] {
     if (model.getActionsFn === undefined) {
diff --git a/plugins/chunter-resources/src/components/chat/navigator/ChatNavSection.svelte b/plugins/chunter-resources/src/components/chat/navigator/ChatNavSection.svelte
index 9ca31ac794..fc471cfb2f 100644
--- a/plugins/chunter-resources/src/components/chat/navigator/ChatNavSection.svelte
+++ b/plugins/chunter-resources/src/components/chat/navigator/ChatNavSection.svelte
@@ -13,20 +13,20 @@
 // limitations under the License.
 -->
 <script lang="ts">
-  import { Doc, Ref } from '@hcengineering/core'
+  import contact from '@hcengineering/contact'
+  import { personAccountByIdStore, statusByUserStore } from '@hcengineering/contact-resources'
+  import { Doc, reduceCalls, Ref } from '@hcengineering/core'
   import { DocNotifyContext } from '@hcengineering/notification'
+  import { getResource, IntlString, translate } from '@hcengineering/platform'
   import { getClient } from '@hcengineering/presentation'
   import ui, { Action, AnySvelteComponent, IconSize, ModernButton, NavGroup } from '@hcengineering/ui'
-  import { getDocTitle } from '@hcengineering/view-resources'
-  import contact from '@hcengineering/contact'
-  import { getResource, IntlString, translate } from '@hcengineering/platform'
   import view from '@hcengineering/view'
-  import { personAccountByIdStore, statusByUserStore } from '@hcengineering/contact-resources'
+  import { getDocTitle } from '@hcengineering/view-resources'
 
-  import ChatNavItem from './ChatNavItem.svelte'
   import chunter from '../../../plugin'
+  import { getChannelName, getObjectIcon } from '../../../utils'
   import { ChatNavItemModel, SortFnOptions } from '../types'
-  import { getObjectIcon, getChannelName } from '../../../utils'
+  import ChatNavItem from './ChatNavItem.svelte'
 
   export let id: string
   export let header: IntlString
@@ -47,7 +47,7 @@
   let canShowMore = false
   let isShownMore = false
 
-  $: void getChatNavItems(objects).then((res) => {
+  $: void getChatNavItems(objects, (res) => {
     items = res
   })
 
@@ -60,44 +60,46 @@
 
   $: visibleItems = getVisibleItems(canShowMore, isShownMore, maxItems, sortedItems, objectId)
 
-  async function getChatNavItems (objects: Doc[]): Promise<ChatNavItemModel[]> {
-    const items: ChatNavItemModel[] = []
+  const getChatNavItems = reduceCalls(
+    async (objects: Doc[], handler: (items: ChatNavItemModel[]) => void): Promise<void> => {
+      const items: ChatNavItemModel[] = []
 
-    for (const object of objects) {
-      const { _class } = object
-      const iconMixin = hierarchy.classHierarchyMixin(_class, view.mixin.ObjectIcon)
-      const titleIntl = client.getHierarchy().getClass(_class).label
+      for (const object of objects) {
+        const { _class } = object
+        const iconMixin = hierarchy.classHierarchyMixin(_class, view.mixin.ObjectIcon)
+        const titleIntl = client.getHierarchy().getClass(_class).label
 
-      const isPerson = hierarchy.isDerived(_class, contact.class.Person)
-      const isDocChat = !hierarchy.isDerived(_class, chunter.class.ChunterSpace)
-      const isDirect = hierarchy.isDerived(_class, chunter.class.DirectMessage)
+        const isPerson = hierarchy.isDerived(_class, contact.class.Person)
+        const isDocChat = !hierarchy.isDerived(_class, chunter.class.ChunterSpace)
+        const isDirect = hierarchy.isDerived(_class, chunter.class.DirectMessage)
 
-      const iconSize: IconSize = isDirect || isPerson ? 'x-small' : 'small'
+        const iconSize: IconSize = isDirect || isPerson ? 'x-small' : 'small'
 
-      let icon: AnySvelteComponent | undefined = undefined
+        let icon: AnySvelteComponent | undefined = undefined
 
-      if (iconMixin?.component) {
-        icon = await getResource(iconMixin.component)
+        if (iconMixin?.component) {
+          icon = await getResource(iconMixin.component)
+        }
+
+        const hasId = hierarchy.classHierarchyMixin(object._class, view.mixin.ObjectIdentifier) !== undefined
+        const showDescription = hasId && isDocChat && !isPerson
+
+        items.push({
+          id: object._id,
+          object,
+          title: (await getChannelName(object._id, object._class, object)) ?? (await translate(titleIntl, {})),
+          description: showDescription ? await getDocTitle(client, object._id, object._class, object) : undefined,
+          icon: icon ?? getObjectIcon(_class),
+          iconProps: { showStatus: true },
+          iconSize,
+          withIconBackground: !isDirect && !isPerson,
+          isSecondary: isDocChat && !isPerson
+        })
       }
 
-      const hasId = hierarchy.classHierarchyMixin(object._class, view.mixin.ObjectIdentifier) !== undefined
-      const showDescription = hasId && isDocChat && !isPerson
-
-      items.push({
-        id: object._id,
-        object,
-        title: (await getChannelName(object._id, object._class, object)) ?? (await translate(titleIntl, {})),
-        description: showDescription ? await getDocTitle(client, object._id, object._class, object) : undefined,
-        icon: icon ?? getObjectIcon(_class),
-        iconProps: { showStatus: true },
-        iconSize,
-        withIconBackground: !isDirect && !isPerson,
-        isSecondary: isDocChat && !isPerson
-      })
+      handler(items)
     }
-
-    return items
-  }
+  )
 
   function onShowMore (): void {
     isShownMore = !isShownMore
diff --git a/plugins/chunter-resources/src/components/chat/navigator/ChatNavigator.svelte b/plugins/chunter-resources/src/components/chat/navigator/ChatNavigator.svelte
index a2fea7d72f..71950e4694 100644
--- a/plugins/chunter-resources/src/components/chat/navigator/ChatNavigator.svelte
+++ b/plugins/chunter-resources/src/components/chat/navigator/ChatNavigator.svelte
@@ -110,7 +110,7 @@
   />
 </div>
 <Scroller shrink>
-  {#each chatNavGroupModels as model}
+  {#each chatNavGroupModels as model (model.id)}
     <ChatNavGroup {object} {model} on:select />
   {/each}
 </Scroller>
diff --git a/plugins/chunter-resources/src/components/chat/utils.ts b/plugins/chunter-resources/src/components/chat/utils.ts
index c998de8c2d..f40c9d34e5 100644
--- a/plugins/chunter-resources/src/components/chat/utils.ts
+++ b/plugins/chunter-resources/src/components/chat/utils.ts
@@ -304,8 +304,7 @@ function getPinnedActions (contexts: DocNotifyContext[]): Action[] {
 }
 
 async function unpinAllChannels (contexts: DocNotifyContext[]): Promise<void> {
-  const doneOp = await getClient().measure('unpinAllChannels')
-  const ops = getClient().apply(generateId())
+  const ops = getClient().apply(generateId(), 'unpinAllChannels')
 
   try {
     for (const context of contexts) {
@@ -313,7 +312,6 @@ async function unpinAllChannels (contexts: DocNotifyContext[]): Promise<void> {
     }
   } finally {
     await ops.commit()
-    await doneOp()
   }
 }
 
@@ -404,8 +402,7 @@ export function loadSavedAttachments (): void {
 export async function removeActivityChannels (contexts: DocNotifyContext[]): Promise<void> {
   const client = InboxNotificationsClientImpl.getClient()
   const notificationsByContext = get(client.inboxNotificationsByContext)
-  const doneOp = await getClient().measure('removeActivityChannels')
-  const ops = getClient().apply(generateId())
+  const ops = getClient().apply(generateId(), 'removeActivityChannels')
 
   try {
     for (const context of contexts) {
@@ -418,15 +415,13 @@ export async function removeActivityChannels (contexts: DocNotifyContext[]): Pro
     }
   } finally {
     await ops.commit()
-    await doneOp()
   }
 }
 
 export async function readActivityChannels (contexts: DocNotifyContext[]): Promise<void> {
   const client = InboxNotificationsClientImpl.getClient()
   const notificationsByContext = get(client.inboxNotificationsByContext)
-  const doneOp = await getClient().measure('readActivityChannels')
-  const ops = getClient().apply(generateId())
+  const ops = getClient().apply(generateId(), 'readActivityChannels')
 
   try {
     for (const context of contexts) {
@@ -441,6 +436,5 @@ export async function readActivityChannels (contexts: DocNotifyContext[]): Promi
     }
   } finally {
     await ops.commit()
-    await doneOp()
   }
 }
diff --git a/plugins/chunter-resources/src/utils.ts b/plugins/chunter-resources/src/utils.ts
index b9b985095e..bfa07e8290 100644
--- a/plugins/chunter-resources/src/utils.ts
+++ b/plugins/chunter-resources/src/utils.ts
@@ -32,7 +32,8 @@ import {
   type IdMap,
   type Ref,
   type Space,
-  type Timestamp
+  type Timestamp,
+  type WithLookup
 } from '@hcengineering/core'
 import notification, { type DocNotifyContext, type InboxNotification } from '@hcengineering/notification'
 import {
@@ -163,7 +164,11 @@ async function getDmAccounts (client: Client, space?: Space): Promise<PersonAcco
   })
 }
 
-export async function getDmPersons (client: Client, space: Space): Promise<Person[]> {
+export async function getDmPersons (
+  client: Client,
+  space: Space,
+  personsMap: Map<Ref<WithLookup<Person>>, WithLookup<Person>>
+): Promise<Person[]> {
   const personAccounts: PersonAccount[] = await getDmAccounts(client, space)
   const me = getCurrentAccount() as PersonAccount
   const persons: Person[] = []
@@ -172,7 +177,7 @@ export async function getDmPersons (client: Client, space: Space): Promise<Perso
   let myPerson: Person | undefined
 
   for (const personRef of personRefs) {
-    const person = await client.findOne(contact.class.Person, { _id: personRef })
+    const person = personsMap.get(personRef) ?? (await client.findOne(contact.class.Person, { _id: personRef }))
     if (person === undefined) {
       continue
     }
@@ -192,8 +197,12 @@ export async function getDmPersons (client: Client, space: Space): Promise<Perso
   return myPerson !== undefined ? [myPerson] : []
 }
 
-export async function DirectTitleProvider (client: Client, id: Ref<DirectMessage>): Promise<string> {
-  const direct = await client.findOne(chunter.class.DirectMessage, { _id: id })
+export async function DirectTitleProvider (
+  client: Client,
+  id: Ref<DirectMessage>,
+  doc?: DirectMessage
+): Promise<string> {
+  const direct = doc ?? (await client.findOne(chunter.class.DirectMessage, { _id: id }))
 
   if (direct === undefined) {
     return ''
@@ -202,8 +211,8 @@ export async function DirectTitleProvider (client: Client, id: Ref<DirectMessage
   return await getDmName(client, direct)
 }
 
-export async function ChannelTitleProvider (client: Client, id: Ref<Channel>): Promise<string> {
-  const channel = await client.findOne(chunter.class.Channel, { _id: id })
+export async function ChannelTitleProvider (client: Client, id: Ref<Channel>, doc?: Channel): Promise<string> {
+  const channel = doc ?? (await client.findOne(chunter.class.Channel, { _id: id }))
 
   if (channel === undefined) {
     return ''
diff --git a/plugins/client-resources/src/connection.ts b/plugins/client-resources/src/connection.ts
index c4c8a6a59c..f513eccb41 100644
--- a/plugins/client-resources/src/connection.ts
+++ b/plugins/client-resources/src/connection.ts
@@ -28,7 +28,6 @@ import core, {
   FindOptions,
   FindResult,
   LoadModelResponse,
-  MeasureDoneOperation,
   Ref,
   SearchOptions,
   SearchQuery,
@@ -524,26 +523,6 @@ class Connection implements ClientConnection {
     return await promise.promise
   }
 
-  async measure (operationName: string): Promise<MeasureDoneOperation> {
-    const dateNow = Date.now()
-
-    // Send measure-start
-    const mid = await this.sendRequest({
-      method: 'measure',
-      params: [operationName]
-    })
-    return async () => {
-      const serverTime: number = await this.sendRequest({
-        method: 'measure-done',
-        params: [operationName, mid]
-      })
-      return {
-        time: Date.now() - dateNow,
-        serverTime
-      }
-    }
-  }
-
   async loadModel (last: Timestamp, hash?: string): Promise<Tx[] | LoadModelResponse> {
     return await this.sendRequest({ method: 'loadModel', params: [last, hash] })
   }
diff --git a/plugins/client-resources/src/index.ts b/plugins/client-resources/src/index.ts
index ebbf954e45..d98dc3f286 100644
--- a/plugins/client-resources/src/index.ts
+++ b/plugins/client-resources/src/index.ts
@@ -28,14 +28,7 @@ import core, {
   createClient,
   type ClientConnection
 } from '@hcengineering/core'
-import platform, {
-  Severity,
-  Status,
-  getMetadata,
-  getPlugins,
-  getResource,
-  setPlatformStatus
-} from '@hcengineering/platform'
+import platform, { Severity, Status, getMetadata, getPlugins, setPlatformStatus } from '@hcengineering/platform'
 import { connect } from './connection'
 
 export { connect }
@@ -88,7 +81,7 @@ export default async () => {
       ): Promise<AccountClient> => {
         const filterModel = getMetadata(clientPlugin.metadata.FilterModel) ?? false
 
-        let client = createClient(
+        const client = createClient(
           (handler: TxHandler) => {
             const url = concatLink(endpoint, `/${token}`)
 
@@ -144,8 +137,6 @@ export default async () => {
           createModelPersistence(getWSFromToken(token)),
           ctx
         )
-        // Check if we had dev hook for client.
-        client = hookClient(client)
         return await client
       }
     }
@@ -203,24 +194,6 @@ function createModelPersistence (workspace: string): TxPersistenceStore | undefi
   }
 }
 
-async function hookClient (client: Promise<AccountClient>): Promise<AccountClient> {
-  const hook = getMetadata(clientPlugin.metadata.ClientHook)
-  if (hook !== undefined) {
-    const hookProc = await getResource(hook)
-    const _client = client
-    client = new Promise((resolve, reject) => {
-      _client
-        .then((res) => {
-          resolve(hookProc(res))
-        })
-        .catch((err) => {
-          reject(err)
-        })
-    })
-  }
-  return await client
-}
-
 function getWSFromToken (token: string): string {
   const parts = token.split('.')
 
diff --git a/plugins/client/src/index.ts b/plugins/client/src/index.ts
index 2c60b728d9..31969efa3a 100644
--- a/plugins/client/src/index.ts
+++ b/plugins/client/src/index.ts
@@ -22,11 +22,6 @@ import { Metadata, plugin } from '@hcengineering/platform'
  */
 export const clientId = 'client' as Plugin
 
-/**
- * @public
- */
-export type ClientHook = (client: AccountClient) => Promise<AccountClient>
-
 /**
  * @public
  */
@@ -74,7 +69,6 @@ export type ClientFactory = (
 
 export default plugin(clientId, {
   metadata: {
-    ClientHook: '' as Metadata<Resource<ClientHook>>,
     ClientSocketFactory: '' as Metadata<ClientSocketFactory>,
     FilterModel: '' as Metadata<boolean>,
     ExtraPlugins: '' as Metadata<Plugin[]>,
diff --git a/plugins/controlled-documents/src/docutils.ts b/plugins/controlled-documents/src/docutils.ts
index 5f4ebb3099..96992a09c5 100644
--- a/plugins/controlled-documents/src/docutils.ts
+++ b/plugins/controlled-documents/src/docutils.ts
@@ -194,7 +194,7 @@ async function createControlledDoc (
 
   const success = await ops.commit()
 
-  return { seqNumber, success }
+  return { seqNumber, success: success.result }
 }
 
 export async function createDocumentTemplate (
@@ -327,7 +327,7 @@ export async function createDocumentTemplate (
 
   const success = await ops.commit()
 
-  return { seqNumber, success }
+  return { seqNumber, success: success.result }
 }
 
 export function getCollaborativeDocForDocument (
diff --git a/plugins/devmodel-resources/src/index.ts b/plugins/devmodel-resources/src/index.ts
index 04d56d664e..c5129ea47f 100644
--- a/plugins/devmodel-resources/src/index.ts
+++ b/plugins/devmodel-resources/src/index.ts
@@ -13,20 +13,15 @@
 // limitations under the License.
 //
 
-import core, {
+import {
   DOMAIN_MODEL,
   cutObjectArray,
-  type Account,
-  type AccountClient,
   type Class,
   type Client,
   type Doc,
   type DocumentQuery,
   type FindOptions,
   type FindResult,
-  type Hierarchy,
-  type MeasureDoneOperation,
-  type ModelDb,
   type Ref,
   type SearchOptions,
   type SearchQuery,
@@ -35,13 +30,10 @@ import core, {
   type TxResult,
   type WithLookup
 } from '@hcengineering/core'
-import { devModelId } from '@hcengineering/devmodel'
-import { Builder } from '@hcengineering/model'
 import { getMetadata, type IntlString, type Resources } from '@hcengineering/platform'
+import { addTxListener } from '@hcengineering/presentation'
+import type { ClientHook } from '@hcengineering/presentation/src/plugin'
 import { testing } from '@hcengineering/ui'
-import view from '@hcengineering/view'
-import workbench from '@hcengineering/workbench'
-import ModelView from './components/ModelView.svelte'
 import devmodel from './plugin'
 
 export interface TxWitHResult {
@@ -57,48 +49,46 @@ export interface QueryWithResult {
   findOne: boolean
 }
 
-class ModelClient implements AccountClient {
+export class PresentationClientHook implements ClientHook {
   notifyEnabled = true
-  constructor (readonly client: AccountClient) {
+  constructor () {
     this.notifyEnabled = (localStorage.getItem('#platform.notification.logging') ?? 'true') === 'true'
 
-    client.notify = (...tx) => {
-      this.notify?.(...tx)
+    addTxListener((...tx) => {
       if (this.notifyEnabled) {
         console.debug(
           'devmodel# notify=>',
           testing ? JSON.stringify(cutObjectArray(tx)).slice(0, 160) : tx.length === 1 ? tx[0] : tx
         )
       }
+    })
+  }
+
+  stackLine (): string {
+    const stack = (new Error().stack ?? '').split('\n')
+
+    let candidate = ''
+    for (let l of stack) {
+      l = l.trim()
+      if (l.includes('.svelte')) {
+        return l
+      }
+      if (l.includes('plugins/') && !l.includes('devmodel-resources/') && l.includes('.ts') && candidate === '') {
+        candidate = l
+      }
     }
-  }
-
-  async measure (operationName: string): Promise<MeasureDoneOperation> {
-    return await this.client.measure(operationName)
-  }
-
-  notify?: (...tx: Tx[]) => void
-
-  getHierarchy (): Hierarchy {
-    return this.client.getHierarchy()
-  }
-
-  getModel (): ModelDb {
-    return this.client.getModel()
-  }
-
-  async getAccount (): Promise<Account> {
-    return await this.client.getAccount()
+    return candidate
   }
 
   async findOne<T extends Doc>(
+    client: Client,
     _class: Ref<Class<T>>,
     query: DocumentQuery<T>,
     options?: FindOptions<T>
   ): Promise<WithLookup<T> | undefined> {
     const startTime = Date.now()
-    const isModel = this.getHierarchy().findDomain(_class) === DOMAIN_MODEL
-    const result = await this.client.findOne(_class, query, options)
+    const isModel = client.getHierarchy().findDomain(_class) === DOMAIN_MODEL
+    const result = await client.findOne(_class, query, options)
     if (this.notifyEnabled && !isModel) {
       console.debug(
         'devmodel# findOne=>',
@@ -108,22 +98,24 @@ class ModelClient implements AccountClient {
         'result => ',
         testing ? JSON.stringify(cutObjectArray(result)) : result,
         ' =>model',
-        this.client.getModel(),
+        client.getModel(),
         getMetadata(devmodel.metadata.DevModel),
-        Date.now() - startTime
+        Date.now() - startTime,
+        this.stackLine()
       )
     }
     return result
   }
 
   async findAll<T extends Doc>(
+    client: Client,
     _class: Ref<Class<T>>,
     query: DocumentQuery<T>,
     options?: FindOptions<T>
   ): Promise<FindResult<T>> {
     const startTime = Date.now()
-    const isModel = this.getHierarchy().findDomain(_class) === DOMAIN_MODEL
-    const result = await this.client.findAll(_class, query, options)
+    const isModel = client.getHierarchy().findDomain(_class) === DOMAIN_MODEL
+    const result = await client.findAll(_class, query, options)
     if (this.notifyEnabled && !isModel) {
       console.debug(
         'devmodel# findAll=>',
@@ -133,17 +125,18 @@ class ModelClient implements AccountClient {
         'result => ',
         testing ? JSON.stringify(cutObjectArray(result)).slice(0, 160) : result,
         ' =>model',
-        this.client.getModel(),
+        client.getModel(),
         getMetadata(devmodel.metadata.DevModel),
         Date.now() - startTime,
-        JSON.stringify(result).length
+        JSON.stringify(result).length,
+        this.stackLine()
       )
     }
     return result
   }
 
-  async searchFulltext (query: SearchQuery, options: SearchOptions): Promise<SearchResult> {
-    const result = await this.client.searchFulltext(query, options)
+  async searchFulltext (client: Client, query: SearchQuery, options: SearchOptions): Promise<SearchResult> {
+    const result = await client.searchFulltext(query, options)
     if (this.notifyEnabled) {
       console.debug(
         'devmodel# searchFulltext=>',
@@ -156,71 +149,25 @@ class ModelClient implements AccountClient {
     return result
   }
 
-  async tx (tx: Tx): Promise<TxResult> {
+  async tx (client: Client, tx: Tx): Promise<TxResult> {
     const startTime = Date.now()
-    const result = await this.client.tx(tx)
+    const result = await client.tx(tx)
     if (this.notifyEnabled) {
       console.debug(
         'devmodel# tx=>',
         testing ? JSON.stringify(cutObjectArray(tx)).slice(0, 160) : tx,
         result,
         getMetadata(devmodel.metadata.DevModel),
-        Date.now() - startTime
+        Date.now() - startTime,
+        this.stackLine()
       )
     }
     return result
   }
-
-  async close (): Promise<void> {
-    await this.client.close()
-  }
-}
-export async function Hook (client: AccountClient): Promise<Client> {
-  console.debug('devmodel# Client HOOKED by DevModel')
-
-  // Client is alive here, we could hook with some model extensions special for DevModel plugin.
-  const builder = new Builder()
-
-  builder.createDoc(
-    workbench.class.Application,
-    core.space.Model,
-    {
-      label: 'DevModel' as IntlString,
-      icon: view.icon.DevModel,
-      alias: devModelId,
-      hidden: false,
-      navigatorModel: {
-        spaces: [],
-        specials: [
-          {
-            label: 'Transactions' as IntlString,
-            icon: view.icon.Table,
-            id: 'transactions',
-            component: devmodel.component.ModelView
-          }
-        ]
-      }
-    },
-    devmodel.ids.DevModelApp
-  )
-
-  const model = client.getModel()
-  for (const tx of builder.getTxes()) {
-    await model.tx(tx)
-  }
-
-  return new ModelClient(client)
 }
 
 export function toIntl (value: string): IntlString {
   return value as IntlString
 }
 
-export default async (): Promise<Resources> => ({
-  component: {
-    ModelView
-  },
-  hook: {
-    Hook
-  }
-})
+export default async (): Promise<Resources> => ({})
diff --git a/plugins/devmodel/src/index.ts b/plugins/devmodel/src/index.ts
index 6e658d1af7..94a987a96b 100644
--- a/plugins/devmodel/src/index.ts
+++ b/plugins/devmodel/src/index.ts
@@ -13,8 +13,7 @@
 // limitations under the License.
 //
 
-import { ClientHook } from '@hcengineering/client'
-import type { Asset, Metadata, Plugin, Resource } from '@hcengineering/platform'
+import type { Asset, Metadata, Plugin } from '@hcengineering/platform'
 import { plugin } from '@hcengineering/platform'
 import type { AnyComponent } from '@hcengineering/ui'
 
@@ -32,9 +31,6 @@ export default plugin(devModelId, {
     TransactionView: '' as AnyComponent,
     NotificationsView: '' as AnyComponent
   },
-  hook: {
-    Hook: '' as Resource<ClientHook>
-  },
   metadata: {
     DevModel: '' as Metadata<any>
   }
diff --git a/plugins/notification-resources/src/components/inbox/Inbox.svelte b/plugins/notification-resources/src/components/inbox/Inbox.svelte
index 52f6689f15..2595bbcf44 100644
--- a/plugins/notification-resources/src/components/inbox/Inbox.svelte
+++ b/plugins/notification-resources/src/components/inbox/Inbox.svelte
@@ -13,37 +13,36 @@
 // limitations under the License.
 -->
 <script lang="ts">
+  import activity, { ActivityMessage } from '@hcengineering/activity'
+  import chunter from '@hcengineering/chunter'
+  import { getCurrentAccount, groupByArray, IdMap, Ref, SortingOrder } from '@hcengineering/core'
   import { DocNotifyContext, InboxNotification, notificationId } from '@hcengineering/notification'
   import { ActionContext, createQuery, getClient } from '@hcengineering/presentation'
-  import view, { decodeObjectURI } from '@hcengineering/view'
   import {
     AnyComponent,
     Component,
     defineSeparators,
+    deviceOptionsStore as deviceInfo,
     Label,
-    location as locationStore,
     Location,
+    location as locationStore,
     restoreLocation,
     Scroller,
     Separator,
     TabItem,
-    TabList,
-    deviceOptionsStore as deviceInfo
+    TabList
   } from '@hcengineering/ui'
-  import chunter from '@hcengineering/chunter'
-  import activity, { ActivityMessage } from '@hcengineering/activity'
-  import { get } from 'svelte/store'
-  import { translate } from '@hcengineering/platform'
-  import { getCurrentAccount, groupByArray, IdMap, Ref, SortingOrder } from '@hcengineering/core'
+  import view, { decodeObjectURI } from '@hcengineering/view'
   import { parseLinkId } from '@hcengineering/view-resources'
+  import { get } from 'svelte/store'
 
   import { InboxNotificationsClientImpl } from '../../inboxNotificationsClient'
-  import SettingsButton from './SettingsButton.svelte'
-  import { getDisplayInboxData, resetInboxContext, resolveLocation, selectInboxContext } from '../../utils'
-  import { InboxData, InboxNotificationsFilter } from '../../types'
-  import InboxGroupedListView from './InboxGroupedListView.svelte'
   import notification from '../../plugin'
+  import { InboxData, InboxNotificationsFilter } from '../../types'
+  import { getDisplayInboxData, resetInboxContext, resolveLocation, selectInboxContext } from '../../utils'
+  import InboxGroupedListView from './InboxGroupedListView.svelte'
   import InboxMenuButton from './InboxMenuButton.svelte'
+  import SettingsButton from './SettingsButton.svelte'
 
   const client = getClient()
   const hierarchy = client.getHierarchy()
@@ -248,8 +247,7 @@
 
     const contextNotifications = $notificationsByContextStore.get(selectedContext._id) ?? []
 
-    const doneOp = await getClient().measure('readNotifications')
-    const ops = getClient().apply(selectedContext._id)
+    const ops = getClient().apply(selectedContext._id, 'readNotifications')
     try {
       await inboxClient.readNotifications(
         ops,
@@ -261,7 +259,6 @@
       )
     } finally {
       await ops.commit()
-      await doneOp()
     }
   }
 
diff --git a/plugins/notification-resources/src/inboxNotificationsClient.ts b/plugins/notification-resources/src/inboxNotificationsClient.ts
index d377a4219f..b9f0ec8d38 100644
--- a/plugins/notification-resources/src/inboxNotificationsClient.ts
+++ b/plugins/notification-resources/src/inboxNotificationsClient.ts
@@ -242,8 +242,7 @@ export class InboxNotificationsClientImpl implements InboxNotificationsClient {
   }
 
   async archiveAllNotifications (): Promise<void> {
-    const doneOp = await getClient().measure('archiveAllNotifications')
-    const ops = getClient().apply(generateId())
+    const ops = getClient().apply(generateId(), 'archiveAllNotifications')
 
     try {
       const inboxNotifications = await ops.findAll(
@@ -264,13 +263,11 @@ export class InboxNotificationsClientImpl implements InboxNotificationsClient {
       }
     } finally {
       await ops.commit()
-      await doneOp()
     }
   }
 
   async readAllNotifications (): Promise<void> {
-    const doneOp = await getClient().measure('readAllNotifications')
-    const ops = getClient().apply(generateId())
+    const ops = getClient().apply(generateId(), 'readAllNotifications')
 
     try {
       const inboxNotifications = await ops.findAll(
@@ -291,13 +288,11 @@ export class InboxNotificationsClientImpl implements InboxNotificationsClient {
       }
     } finally {
       await ops.commit()
-      await doneOp()
     }
   }
 
   async unreadAllNotifications (): Promise<void> {
-    const doneOp = await getClient().measure('unreadAllNotifications')
-    const ops = getClient().apply(generateId())
+    const ops = getClient().apply(generateId(), 'unreadAllNotifications')
 
     try {
       const inboxNotifications = await ops.findAll(
@@ -332,7 +327,6 @@ export class InboxNotificationsClientImpl implements InboxNotificationsClient {
       }
     } finally {
       await ops.commit()
-      await doneOp()
     }
   }
 }
diff --git a/plugins/notification-resources/src/utils.ts b/plugins/notification-resources/src/utils.ts
index 25b0a194c9..3ad77b34ef 100644
--- a/plugins/notification-resources/src/utils.ts
+++ b/plugins/notification-resources/src/utils.ts
@@ -49,21 +49,21 @@ import { MessageBox, getClient } from '@hcengineering/presentation'
 import {
   getCurrentLocation,
   getLocation,
+  locationStorageKeyId,
   navigate,
   parseLocation,
   showPopup,
   type Location,
-  type ResolvedLocation,
-  locationStorageKeyId
+  type ResolvedLocation
 } from '@hcengineering/ui'
 import { get, writable } from 'svelte/store'
 
+import chunter, { type ThreadMessage } from '@hcengineering/chunter'
+import { getMetadata } from '@hcengineering/platform'
+import { decodeObjectURI, encodeObjectURI, type LinkIdProvider } from '@hcengineering/view'
+import { getObjectLinkId } from '@hcengineering/view-resources'
 import { InboxNotificationsClientImpl } from './inboxNotificationsClient'
 import { type InboxData, type InboxNotificationsFilter } from './types'
-import { getMetadata } from '@hcengineering/platform'
-import { getObjectLinkId } from '@hcengineering/view-resources'
-import { decodeObjectURI, encodeObjectURI, type LinkIdProvider } from '@hcengineering/view'
-import chunter, { type ThreadMessage } from '@hcengineering/chunter'
 
 export async function hasDocNotifyContextPinAction (docNotifyContext: DocNotifyContext): Promise<boolean> {
   if (docNotifyContext.hidden) {
@@ -107,8 +107,7 @@ export async function readNotifyContext (doc: DocNotifyContext): Promise<void> {
   const inboxClient = InboxNotificationsClientImpl.getClient()
   const inboxNotifications = get(inboxClient.inboxNotificationsByContext).get(doc._id) ?? []
 
-  const doneOp = await getClient().measure('readNotifyContext')
-  const ops = getClient().apply(doc._id)
+  const ops = getClient().apply(doc._id, 'readNotifyContext')
   try {
     await inboxClient.readNotifications(
       ops,
@@ -117,7 +116,6 @@ export async function readNotifyContext (doc: DocNotifyContext): Promise<void> {
     await ops.update(doc, { lastViewedTimestamp: Date.now() })
   } finally {
     await ops.commit()
-    await doneOp()
   }
 }
 
@@ -133,8 +131,7 @@ export async function unReadNotifyContext (doc: DocNotifyContext): Promise<void>
     return
   }
 
-  const doneOp = await getClient().measure('unReadNotifyContext')
-  const ops = getClient().apply(doc._id)
+  const ops = getClient().apply(doc._id, 'unReadNotifyContext')
 
   try {
     await inboxClient.unreadNotifications(
@@ -154,7 +151,6 @@ export async function unReadNotifyContext (doc: DocNotifyContext): Promise<void>
     }
   } finally {
     await ops.commit()
-    await doneOp()
   }
 }
 
@@ -166,8 +162,7 @@ export async function archiveContextNotifications (doc?: DocNotifyContext): Prom
     return
   }
 
-  const doneOp = await getClient().measure('archiveContextNotifications')
-  const ops = getClient().apply(doc._id)
+  const ops = getClient().apply(doc._id, 'archiveContextNotifications')
 
   try {
     const notifications = await ops.findAll(
@@ -182,7 +177,6 @@ export async function archiveContextNotifications (doc?: DocNotifyContext): Prom
     await ops.update(doc, { lastViewedTimestamp: Date.now() })
   } finally {
     await ops.commit()
-    await doneOp()
   }
 }
 
@@ -194,8 +188,7 @@ export async function unarchiveContextNotifications (doc?: DocNotifyContext): Pr
     return
   }
 
-  const doneOp = await getClient().measure('unarchiveContextNotifications')
-  const ops = getClient().apply(doc._id)
+  const ops = getClient().apply(doc._id, 'unarchiveContextNotifications')
 
   try {
     const notifications = await ops.findAll(
@@ -209,7 +202,6 @@ export async function unarchiveContextNotifications (doc?: DocNotifyContext): Pr
     }
   } finally {
     await ops.commit()
-    await doneOp()
   }
 }
 
diff --git a/plugins/tracker-resources/src/components/CreateIssue.svelte b/plugins/tracker-resources/src/components/CreateIssue.svelte
index 5ed865757f..eead94f556 100644
--- a/plugins/tracker-resources/src/components/CreateIssue.svelte
+++ b/plugins/tracker-resources/src/components/CreateIssue.svelte
@@ -442,10 +442,8 @@
 
     // TODO: We need a measure client and mark all operations with it as measure under one root,
     // to prevent other operations to infer our measurement.
-    const doneOp = await getClient().measure('tracker.createIssue')
-
     try {
-      const operations = client.apply(_id)
+      const operations = client.apply(_id, 'tracker.createIssue')
 
       const lastOne = await client.findOne<Issue>(
         tracker.class.Issue,
@@ -533,7 +531,7 @@
         }
       }
 
-      await operations.commit()
+      const result = await operations.commit()
       await descriptionBox?.createAttachments(_id)
 
       const parents: IssueParentInfo[] =
@@ -565,15 +563,12 @@
       descriptionBox?.removeDraft(false)
       isAssigneeTouched = false
       const d1 = Date.now()
-      void doneOp().then((res) => {
-        console.log('createIssue measure', res, Date.now() - d1)
-      })
+      console.log('createIssue measure', result, Date.now() - d1)
     } catch (err: any) {
       resetObject()
       draftController.remove()
       descriptionBox?.removeDraft(false)
       console.error(err)
-      await doneOp() // Complete in case of error
       Analytics.handleError(err)
     }
   }
diff --git a/plugins/tracker-resources/src/components/projects/CreateProject.svelte b/plugins/tracker-resources/src/components/projects/CreateProject.svelte
index 3ca83c9632..7ba05e0886 100644
--- a/plugins/tracker-resources/src/components/projects/CreateProject.svelte
+++ b/plugins/tracker-resources/src/components/projects/CreateProject.svelte
@@ -235,7 +235,7 @@
       await ops.createDoc(tracker.class.Project, core.space.Space, { ...projectData, type: typeId }, projectId)
       const succeeded = await ops.commit()
 
-      if (succeeded) {
+      if (succeeded.result) {
         // Add space type's mixin with roles assignments
         await client.createMixin(
           projectId,
diff --git a/plugins/tracker-resources/src/issues.ts b/plugins/tracker-resources/src/issues.ts
index a08551989d..88cd4c9571 100644
--- a/plugins/tracker-resources/src/issues.ts
+++ b/plugins/tracker-resources/src/issues.ts
@@ -25,8 +25,8 @@ export async function issueIdentifierProvider (client: TxOperations, ref: Ref<Is
   return object.identifier
 }
 
-export async function issueTitleProvider (client: TxOperations, ref: Ref<Doc>): Promise<string> {
-  const object = await client.findOne(tracker.class.Issue, { _id: ref as Ref<Issue> })
+export async function issueTitleProvider (client: TxOperations, ref: Ref<Doc>, doc?: Issue): Promise<string> {
+  const object = doc ?? (await client.findOne(tracker.class.Issue, { _id: ref as Ref<Issue> }))
 
   if (object === undefined) {
     return ''
diff --git a/server-plugins/activity-resources/src/references.ts b/server-plugins/activity-resources/src/references.ts
index fcd176016e..0c33147172 100644
--- a/server-plugins/activity-resources/src/references.ts
+++ b/server-plugins/activity-resources/src/references.ts
@@ -652,7 +652,7 @@ async function ActivityReferenceCreate (tx: TxCUD<Doc>, control: TriggerControl)
   )
 
   if (txes.length !== 0) {
-    await control.apply(txes, true)
+    await control.apply(txes)
   }
 
   return []
@@ -699,7 +699,7 @@ async function ActivityReferenceUpdate (tx: TxCUD<Doc>, control: TriggerControl)
   )
 
   if (txes.length !== 0) {
-    await control.apply(txes, true)
+    await control.apply(txes)
   }
 
   return []
@@ -723,7 +723,7 @@ async function ActivityReferenceRemove (tx: Tx, control: TriggerControl): Promis
 
     const txes: Tx[] = await getRemoveActivityReferenceTxes(control, txFactory, ctx.objectId)
     if (txes.length !== 0) {
-      await control.apply(txes, true)
+      await control.apply(txes)
     }
   }
 
diff --git a/server-plugins/chunter-resources/src/index.ts b/server-plugins/chunter-resources/src/index.ts
index 021638b481..8845a8d84c 100644
--- a/server-plugins/chunter-resources/src/index.ts
+++ b/server-plugins/chunter-resources/src/index.ts
@@ -13,7 +13,9 @@
 // limitations under the License.
 //
 
+import activity, { ActivityMessage, ActivityReference } from '@hcengineering/activity'
 import chunter, { Channel, ChatMessage, chunterId, ChunterSpace, ThreadMessage } from '@hcengineering/chunter'
+import { Person, PersonAccount } from '@hcengineering/contact'
 import core, {
   Account,
   AttachedDoc,
@@ -38,14 +40,12 @@ import notification, { Collaborators, NotificationContent } from '@hcengineering
 import { getMetadata, IntlString } from '@hcengineering/platform'
 import serverCore, { TriggerControl } from '@hcengineering/server-core'
 import {
+  createCollaboratorNotifications,
   getDocCollaborators,
-  getMixinTx,
-  createCollaboratorNotifications
+  getMixinTx
 } from '@hcengineering/server-notification-resources'
-import { workbenchId } from '@hcengineering/workbench'
 import { stripTags } from '@hcengineering/text'
-import { Person, PersonAccount } from '@hcengineering/contact'
-import activity, { ActivityMessage, ActivityReference } from '@hcengineering/activity'
+import { workbenchId } from '@hcengineering/workbench'
 
 import { NOTIFICATION_BODY_SIZE } from '@hcengineering/server-notification'
 
@@ -258,13 +258,24 @@ async function OnThreadMessageDeleted (tx: Tx, control: TriggerControl): Promise
  * @public
  */
 export async function ChunterTrigger (tx: TxCUD<Doc>, control: TriggerControl): Promise<Tx[]> {
-  const res = await Promise.all([
-    OnThreadMessageCreated(tx, control),
-    OnThreadMessageDeleted(tx, control),
-    OnCollaboratorsChanged(tx as TxMixin<Doc, Collaborators>, control),
-    OnChatMessageCreated(tx, control)
-  ])
-  return res.flat()
+  const res: Tx[] = []
+  res.push(
+    ...(await control.ctx.with('OnThreadMessageCreated', {}, async (ctx) => await OnThreadMessageCreated(tx, control)))
+  )
+  res.push(
+    ...(await control.ctx.with('OnThreadMessageDeleted', {}, async (ctx) => await OnThreadMessageDeleted(tx, control)))
+  )
+  res.push(
+    ...(await control.ctx.with(
+      'OnCollaboratorsChanged',
+      {},
+      async (ctx) => await OnCollaboratorsChanged(tx as TxMixin<Doc, Collaborators>, control)
+    ))
+  )
+  res.push(
+    ...(await control.ctx.with('OnChatMessageCreated', {}, async (ctx) => await OnChatMessageCreated(tx, control)))
+  )
+  return res
 }
 
 /**
@@ -393,7 +404,7 @@ async function OnChannelMembersChanged (tx: TxUpdateDoc<Channel>, control: Trigg
         lastViewedTimestamp: tx.modifiedOn
       })
 
-      await control.apply([createTx], true)
+      await control.apply([createTx])
     } else {
       const updateTx = control.txFactory.createTxUpdateDoc(context._class, context.space, context._id, {
         hidden: false,
diff --git a/server-plugins/controlled-documents-resources/src/index.ts b/server-plugins/controlled-documents-resources/src/index.ts
index ef356bfb94..d7d3c43a3b 100644
--- a/server-plugins/controlled-documents-resources/src/index.ts
+++ b/server-plugins/controlled-documents-resources/src/index.ts
@@ -284,7 +284,7 @@ async function createDocumentTrainingRequest (doc: ControlledDocument, control:
   // Force space to make transaction persistent and raise notifications
   resTx.space = core.space.Tx
 
-  await control.apply([resTx], true)
+  await control.apply([resTx])
 
   return []
 }
@@ -368,7 +368,7 @@ export async function OnDocPlannedEffectiveDateChanged (
   if (tx.operations.plannedEffectiveDate === 0 && doc.controlledState === ControlledDocumentState.Approved) {
     // Create with not derived tx factory in order for notifications to work
     const factory = new TxFactory(control.txFactory.account)
-    await control.apply([makeDocEffective(doc, factory)], true)
+    await control.apply([makeDocEffective(doc, factory)])
   }
 
   return []
@@ -385,7 +385,7 @@ export async function OnDocApprovalRequestApproved (
 
   // Create with not derived tx factory in order for notifications to work
   const factory = new TxFactory(control.txFactory.account)
-  await control.apply([makeDocEffective(doc, factory)], true)
+  await control.apply([makeDocEffective(doc, factory)])
 
   // make doc effective immediately
   return []
diff --git a/server-plugins/love-resources/src/index.ts b/server-plugins/love-resources/src/index.ts
index 658ebb741d..b265e5dd61 100644
--- a/server-plugins/love-resources/src/index.ts
+++ b/server-plugins/love-resources/src/index.ts
@@ -97,9 +97,10 @@ async function createUserInfo (acc: Ref<Account>, control: TriggerControl): Prom
         query: { person }
       }
     ],
-    [tx]
+    [tx],
+    'createUserInfo'
   )
-  await control.apply([ptx], true)
+  await control.apply([ptx])
   return []
 }
 
@@ -114,7 +115,7 @@ async function removeUserInfo (acc: Ref<Account>, control: TriggerControl): Prom
   const person = account.person
   const infos = await control.findAll(love.class.ParticipantInfo, { person })
   for (const info of infos) {
-    await control.apply([control.txFactory.createTxRemoveDoc(info._class, info.space, info._id)], true)
+    await control.apply([control.txFactory.createTxRemoveDoc(info._class, info.space, info._id)])
   }
 }
 
diff --git a/server-plugins/notification-resources/src/index.ts b/server-plugins/notification-resources/src/index.ts
index 8de706185f..34d6b38702 100644
--- a/server-plugins/notification-resources/src/index.ts
+++ b/server-plugins/notification-resources/src/index.ts
@@ -15,6 +15,7 @@
 //
 
 import activity, { ActivityMessage, DocUpdateMessage } from '@hcengineering/activity'
+import { Analytics } from '@hcengineering/analytics'
 import chunter, { ChatMessage } from '@hcengineering/chunter'
 import contact, {
   type AvatarInfo,
@@ -42,6 +43,7 @@ import core, {
   RefTo,
   Space,
   Timestamp,
+  toIdMap,
   Tx,
   TxCollectionCUD,
   TxCreateDoc,
@@ -75,12 +77,11 @@ import serverNotification, {
   getPersonAccountById,
   NOTIFICATION_BODY_SIZE
 } from '@hcengineering/server-notification'
+import serverView from '@hcengineering/server-view'
 import { stripTags } from '@hcengineering/text'
+import { encodeObjectURI } from '@hcengineering/view'
 import { workbenchId } from '@hcengineering/workbench'
 import webpush, { WebPushError } from 'web-push'
-import { encodeObjectURI } from '@hcengineering/view'
-import serverView from '@hcengineering/server-view'
-import { Analytics } from '@hcengineering/analytics'
 
 import { Content, NotifyParams, NotifyResult, UserInfo } from './types'
 import {
@@ -396,14 +397,24 @@ export async function pushInboxNotifications (
       hidden: false,
       lastUpdateTimestamp: shouldUpdateTimestamp ? modifiedOn : undefined
     })
-    await control.apply([createContextTx], true, [account.email])
+    await control.apply([createContextTx])
+    control.operationContext.derived.targets['docNotifyContext' + createContextTx._id] = (it) => {
+      if (it._id === createContextTx._id) {
+        return [account.email]
+      }
+    }
     docNotifyContextId = createContextTx.objectId
   } else {
     if (shouldUpdateTimestamp && context.lastUpdateTimestamp !== modifiedOn) {
       const updateTx = control.txFactory.createTxUpdateDoc(context._class, context.space, context._id, {
         lastUpdateTimestamp: modifiedOn
       })
-      await control.apply([updateTx], true, [account.email])
+      await control.apply([updateTx])
+      control.operationContext.derived.targets['docNotifyContext' + updateTx._id] = (it) => {
+        if (it._id === updateTx._id) {
+          return [account.email]
+        }
+      }
     }
     docNotifyContextId = context._id
   }
@@ -636,7 +647,7 @@ async function sendPushToSubscription (
     console.log('Cannot send push notification to', targetUser, err)
     if (err instanceof WebPushError && err.body.includes('expired')) {
       const tx = control.txFactory.createTxRemoveDoc(subscription._class, subscription.space, subscription._id)
-      await control.apply([tx], true)
+      await control.apply([tx])
     }
   }
 }
@@ -1286,7 +1297,14 @@ async function applyUserTxes (
 
     if (account !== undefined) {
       cache.set(account._id, account)
-      await control.apply(txs, true, [account.email])
+      await control.apply(txs)
+
+      const m1 = toIdMap(txes)
+      control.operationContext.derived.targets.docNotifyContext = (it) => {
+        if (m1.has(it._id)) {
+          return [account.email]
+        }
+      }
     }
   }
 
diff --git a/server-plugins/request-resources/src/index.ts b/server-plugins/request-resources/src/index.ts
index d407922052..ea367fad68 100644
--- a/server-plugins/request-resources/src/index.ts
+++ b/server-plugins/request-resources/src/index.ts
@@ -99,7 +99,7 @@ async function OnRequestUpdate (tx: TxCollectionCUD<Doc, Request>, control: Trig
   }
 
   if (applyTxes.length > 0) {
-    await control.apply(applyTxes, true)
+    await control.apply(applyTxes)
   }
 
   return []
diff --git a/server-plugins/time-resources/src/index.ts b/server-plugins/time-resources/src/index.ts
index 220623a2e7..ab49c5df9e 100644
--- a/server-plugins/time-resources/src/index.ts
+++ b/server-plugins/time-resources/src/index.ts
@@ -107,7 +107,7 @@ export async function OnWorkSlotCreate (tx: Tx, control: TriggerControl): Promis
             issue.collection,
             innerTx
           )
-          await control.apply([outerTx], true)
+          await control.apply([outerTx])
           return []
         }
       }
@@ -153,7 +153,7 @@ export async function OnToDoRemove (tx: Tx, control: TriggerControl): Promise<Tx
             issue.collection,
             innerTx
           )
-          await control.apply([outerTx], true)
+          await control.apply([outerTx])
           return []
         }
       }
@@ -304,7 +304,7 @@ export async function OnToDoUpdate (tx: Tx, control: TriggerControl): Promise<Tx
     if (funcs !== undefined) {
       const func = await getResource(funcs.onDone)
       const todoRes = await func(control, resEvents, todo)
-      await control.apply(todoRes, true)
+      await control.apply(todoRes)
     }
     return res
   }
@@ -447,7 +447,7 @@ async function createIssueHandler (issue: Issue, control: TriggerControl): Promi
     if (status.category === task.statusCategory.Active || status.category === task.statusCategory.ToDo) {
       const tx = await getCreateToDoTx(issue, issue.assignee, control)
       if (tx !== undefined) {
-        await control.apply([tx], true)
+        await control.apply([tx])
       }
     }
   }
@@ -561,7 +561,7 @@ async function changeIssueStatusHandler (
       if (todos.length === 0) {
         const tx = await getCreateToDoTx(issue, issue.assignee, control)
         if (tx !== undefined) {
-          await control.apply([tx], true)
+          await control.apply([tx])
         }
       }
     }
diff --git a/server/core/src/server/storage.ts b/server/core/src/server/storage.ts
index 26f97db464..74d0ba70d2 100644
--- a/server/core/src/server/storage.ts
+++ b/server/core/src/server/storage.ts
@@ -24,9 +24,10 @@ import core, {
   TxProcessor,
   cutObjectArray,
   toFindResult,
-  type Branding,
   type Account,
   type AttachedDoc,
+  type Branding,
+  type BroadcastTargets,
   type Class,
   type Client,
   type Collection,
@@ -50,6 +51,7 @@ import core, {
   type Timestamp,
   type Tx,
   type TxApplyIf,
+  type TxApplyResult,
   type TxCUD,
   type TxCollectionCUD,
   type TxRemoveDoc,
@@ -612,7 +614,7 @@ export class TServerStorage implements ServerStorage {
     return result
   }
 
-  private async broadcastCtx (derived: SessionOperationContext['derived']): Promise<void> {
+  private async broadcastCtx (derived: Tx[], targets?: BroadcastTargets): Promise<void> {
     const toSendTarget = new Map<string, Tx[]>()
 
     const getTxes = (key: string): Tx[] => {
@@ -626,16 +628,23 @@ export class TServerStorage implements ServerStorage {
 
     // Put current user as send target
     for (const txd of derived) {
-      if (txd.target === undefined) {
+      let target: string[] | undefined
+      for (const tt of Object.values(targets ?? {})) {
+        target = tt(txd)
+        if (target !== undefined) {
+          break
+        }
+      }
+      if (target === undefined) {
         getTxes('') // Be sure we have empty one
 
         // Also add to all other targeted sends
         for (const v of toSendTarget.values()) {
-          v.push(...txd.derived)
+          v.push(txd)
         }
       } else {
-        for (const t of txd.target) {
-          getTxes(t).push(...txd.derived)
+        for (const t of target) {
+          getTxes(t).push(txd)
         }
       }
     }
@@ -708,7 +717,9 @@ export class TServerStorage implements ServerStorage {
     )
     const moves = await ctx.with('process-move', {}, (ctx) => this.processMove(ctx.ctx, txes, findAll))
 
-    const triggerControl: Omit<TriggerControl, 'txFactory' | 'ctx' | 'result'> = {
+    const applyTxes: Tx[] = []
+
+    const triggerControl: Omit<TriggerControl, 'txFactory' | 'ctx' | 'result' | 'apply'> = {
       operationContext: ctx,
       removedMap,
       workspace: this.workspaceId,
@@ -719,52 +730,73 @@ export class TServerStorage implements ServerStorage {
       findAllCtx: findAll,
       modelDb: this.modelDb,
       hierarchy: this.hierarchy,
-      apply: async (tx, broadcast, target) => {
-        return await this.apply(ctx, tx, broadcast, target)
-      },
-      applyCtx: async (ctx, tx, broadcast, target) => {
-        return await this.apply(ctx, tx, broadcast, target)
+      applyCtx: async (ctx, tx, needResult) => {
+        if (needResult === true) {
+          return await this.apply(ctx, tx)
+        } else {
+          applyTxes.push(...tx)
+        }
+        return {}
       },
       // Will create a live query if missing and return values immediately if already asked.
       queryFind: async (_class, query, options) => {
         return await this.liveQuery.queryFind(_class, query, options)
       }
     }
-    const triggers = await ctx.with('process-triggers', {}, async (ctx) => {
-      const result: Tx[] = []
-      const { transactions, performAsync } = await this.triggers.apply(ctx, txes, {
-        ...triggerControl,
-        ctx: ctx.ctx,
-        findAll: fAll(ctx.ctx),
-        result
-      })
-      result.push(...transactions)
+    const triggers = await ctx.with(
+      'process-triggers',
+      {},
+      async (ctx) => {
+        const result: Tx[] = []
+        const { transactions, performAsync } = await this.triggers.apply(ctx, txes, {
+          ...triggerControl,
+          ctx: ctx.ctx,
+          findAll: fAll(ctx.ctx),
+          result
+        })
+        result.push(...transactions)
 
-      if (performAsync !== undefined) {
-        const asyncTriggerProcessor = async (): Promise<void> => {
-          await ctx.with('process-async-triggers', {}, async (ctx) => {
-            const sctx = ctx as SessionContext
-            const applyCtx: SessionContextImpl = new SessionContextImpl(
-              ctx.ctx,
-              sctx.userEmail,
-              sctx.sessionId,
-              sctx.admin,
-              [],
-              this.workspaceId,
-              this.options.branding
+        if (applyTxes.length > 0) {
+          await this.apply(ctx, applyTxes)
+        }
+
+        if (performAsync !== undefined) {
+          const asyncTriggerProcessor = async (): Promise<void> => {
+            await ctx.with(
+              'process-async-triggers',
+              {},
+              async (ctx) => {
+                const sctx = ctx as SessionContext
+                const applyCtx: SessionContextImpl = new SessionContextImpl(
+                  ctx.ctx,
+                  sctx.userEmail,
+                  sctx.sessionId,
+                  sctx.admin,
+                  { txes: [], targets: {} },
+                  this.workspaceId,
+                  this.options.branding,
+                  true
+                )
+                const result = await performAsync(applyCtx)
+
+                if (applyTxes.length > 0) {
+                  await this.apply(applyCtx, applyTxes)
+                }
+                // We need to broadcast changes
+                await this.broadcastCtx(applyCtx.derived.txes.concat(result), applyCtx.derived.targets)
+              },
+              { count: txes.length }
             )
-            const result = await performAsync(applyCtx)
-            // We need to broadcast changes
-            await this.broadcastCtx([{ derived: result }, ...applyCtx.derived])
+          }
+          setTimeout(() => {
+            void asyncTriggerProcessor()
           })
         }
-        setTimeout(() => {
-          void asyncTriggerProcessor()
-        })
-      }
 
-      return result
-    })
+        return result
+      },
+      { count: txes.length }
+    )
 
     const derived = [...removed, ...collections, ...moves, ...triggers]
 
@@ -835,8 +867,8 @@ export class TServerStorage implements ServerStorage {
     return { passed, onEnd }
   }
 
-  async apply (ctx: SessionOperationContext, txes: Tx[], broadcast: boolean, target?: string[]): Promise<TxResult> {
-    return await this.processTxes(ctx, txes, broadcast, target)
+  async apply (ctx: SessionOperationContext, txes: Tx[]): Promise<TxResult> {
+    return await this.processTxes(ctx, txes)
   }
 
   fillTxes (txes: Tx[], txToStore: Tx[], modelTx: Tx[], txToProcess: Tx[], applyTxes: Tx[]): void {
@@ -861,12 +893,7 @@ export class TServerStorage implements ServerStorage {
     }
   }
 
-  async processTxes (
-    ctx: SessionOperationContext,
-    txes: Tx[],
-    broadcast: boolean,
-    target?: string[]
-  ): Promise<TxResult> {
+  async processTxes (ctx: SessionOperationContext, txes: Tx[]): Promise<TxResult> {
     // store tx
     const _findAll: ServerStorage['findAll'] = async <T extends Doc>(
       ctx: MeasureContext,
@@ -914,16 +941,25 @@ export class TServerStorage implements ServerStorage {
         await this.triggers.tx(tx)
         await this.modelDb.tx(tx)
       }
-      await ctx.with('domain-tx', {}, async (ctx) => await this.getAdapter(DOMAIN_TX, true).tx(ctx.ctx, ...txToStore))
-      result.push(...(await ctx.with('apply', {}, (ctx) => this.routeTx(ctx.ctx, removedMap, ...txToProcess))))
+      await ctx.with('domain-tx', {}, async (ctx) => await this.getAdapter(DOMAIN_TX, true).tx(ctx.ctx, ...txToStore), {
+        count: txToStore.length
+      })
+      result.push(...(await ctx.with('apply', {}, (ctx) => this.routeTx(ctx.ctx, removedMap, ...txToProcess))), {
+        count: txToProcess.length
+      })
 
       // invoke triggers and store derived objects
       derived.push(...(await this.processDerived(ctx, txToProcess, _findAll, removedMap)))
 
       // index object
-      await ctx.with('fulltext-tx', {}, async (ctx) => {
-        await this.fulltext.tx(ctx.ctx, [...txToProcess, ...derived])
-      })
+      await ctx.with(
+        'fulltext-tx',
+        {},
+        async (ctx) => {
+          await this.fulltext.tx(ctx.ctx, [...txToProcess, ...derived])
+        },
+        { count: txToProcess.length + derived.length }
+      )
     } catch (err: any) {
       ctx.ctx.error('error process tx', { error: err })
       Analytics.handleError(err)
@@ -933,16 +969,33 @@ export class TServerStorage implements ServerStorage {
         p()
       })
     }
-    if (derived.length > 0 && broadcast) {
-      ctx.derived.push({ derived, target })
+    if (derived.length > 0) {
+      ctx.derived.txes.push(...derived)
     }
     return result[0]
   }
 
   async tx (ctx: SessionOperationContext, tx: Tx): Promise<TxResult> {
-    return await ctx.with('client-tx', { _class: tx._class }, async (ctx) => {
-      return await this.processTxes(ctx, [tx], true)
-    })
+    let measureName: string | undefined
+    let st: number | undefined
+    if (tx._class === core.class.TxApplyIf && (tx as TxApplyIf).measureName !== undefined) {
+      measureName = (tx as TxApplyIf).measureName
+      st = Date.now()
+    }
+
+    const result = await ctx.with(
+      measureName !== undefined ? `📶 ${measureName}` : 'client-tx',
+      { _class: tx._class },
+      async (ctx) => {
+        return await this.processTxes(ctx, [tx])
+      }
+    )
+
+    if (measureName !== undefined && st !== undefined) {
+      ;(result as TxApplyResult).serverTime = Date.now() - st
+    }
+
+    return result
   }
 
   find (ctx: MeasureContext, domain: Domain, recheck?: boolean): StorageIterator {
diff --git a/server/core/src/triggers.ts b/server/core/src/triggers.ts
index 12c37dfe7f..fccfa4b3db 100644
--- a/server/core/src/triggers.ts
+++ b/server/core/src/triggers.ts
@@ -17,6 +17,7 @@
 import core, {
   TxFactory,
   cutObjectArray,
+  groupByArray,
   matchQuery,
   type AttachedDoc,
   type Class,
@@ -31,15 +32,18 @@ import core, {
   type TxCreateDoc
 } from '@hcengineering/core'
 
+import { Analytics } from '@hcengineering/analytics'
 import { getResource, type Resource } from '@hcengineering/platform'
 import type { Trigger, TriggerControl, TriggerFunc } from './types'
-import { Analytics } from '@hcengineering/analytics'
 
 import serverCore from './plugin'
+import type { SessionContextImpl } from './utils'
 
 interface TriggerRecord {
   query?: DocumentQuery<Tx>
   trigger: { op: TriggerFunc, resource: Resource<TriggerFunc>, isAsync: boolean }
+
+  arrays: boolean
 }
 /**
  * @public
@@ -64,7 +68,8 @@ export class Triggers {
 
         this.triggers.push({
           query: match,
-          trigger: { op: func, resource: trigger, isAsync }
+          trigger: { op: func, resource: trigger, isAsync },
+          arrays: (createTx as TxCreateDoc<Trigger>).attributes.arrays === true
         })
       }
     }
@@ -73,47 +78,55 @@ export class Triggers {
   async apply (
     ctx: SessionOperationContext,
     tx: Tx[],
-    ctrl: Omit<TriggerControl, 'txFactory'>
+    ctrl: Omit<TriggerControl, 'txFactory' | 'apply'>
   ): Promise<{
       transactions: Tx[]
       performAsync?: (ctx: SessionOperationContext) => Promise<Tx[]>
     }> {
     const result: Tx[] = []
 
+    const suppressAsync = (ctx as SessionContextImpl).isAsyncContext ?? false
+
     const asyncRequest: {
       matches: Tx[]
       trigger: TriggerRecord['trigger']
+      arrays: TriggerRecord['arrays']
     }[] = []
 
     const applyTrigger = async (
       ctx: SessionOperationContext,
       matches: Tx[],
-      trigger: TriggerRecord['trigger'],
+      { trigger, arrays }: TriggerRecord,
       result: Tx[]
     ): Promise<void> => {
-      for (const tx of matches) {
-        try {
-          result.push(
-            ...(await trigger.op(tx, {
-              ...ctrl,
-              ctx: ctx.ctx,
-              txFactory: new TxFactory(tx.modifiedBy, true),
-              findAll: async (clazz, query, options) => await ctrl.findAllCtx(ctx.ctx, clazz, query, options),
-              apply: async (tx, broadcast, target) => {
-                return await ctrl.applyCtx(ctx, tx, broadcast, target)
-              },
-              result
-            }))
-          )
-        } catch (err: any) {
-          ctx.ctx.error('failed to process trigger', { trigger: trigger.resource, tx, err })
-          Analytics.handleError(err)
+      const group = groupByArray(matches, (it) => it.modifiedBy)
+
+      const tctrl: TriggerControl = {
+        ...ctrl,
+        operationContext: ctx,
+        ctx: ctx.ctx,
+        txFactory: new TxFactory(core.account.System, true),
+        findAll: async (clazz, query, options) => await ctrl.findAllCtx(ctx.ctx, clazz, query, options),
+        apply: async (tx, needResult) => {
+          return await ctrl.applyCtx(ctx, tx, needResult)
+        },
+        result
+      }
+      for (const [k, v] of group.entries()) {
+        const m = arrays ? [v] : v
+        tctrl.txFactory = new TxFactory(k, true)
+        for (const tx of m) {
+          try {
+            result.push(...(await trigger.op(tx, tctrl)))
+          } catch (err: any) {
+            ctx.ctx.error('failed to process trigger', { trigger: trigger.resource, tx, err })
+            Analytics.handleError(err)
+          }
         }
       }
     }
 
-    const promises: Promise<void>[] = []
-    for (const { query, trigger } of this.triggers) {
+    for (const { query, trigger, arrays } of this.triggers) {
       let matches = tx
       if (query !== undefined) {
         this.addDerived(query, 'objectClass')
@@ -121,23 +134,26 @@ export class Triggers {
         matches = matchQuery(tx, query, core.class.Tx, ctrl.hierarchy) as Tx[]
       }
       if (matches.length > 0) {
-        if (trigger.isAsync) {
+        if (trigger.isAsync && !suppressAsync) {
           asyncRequest.push({
             matches,
-            trigger
+            trigger,
+            arrays
           })
         } else {
-          promises.push(
-            ctx.with(trigger.resource, {}, async (ctx) => {
-              await applyTrigger(ctx, matches, trigger, result)
-            })
+          await ctx.with(
+            trigger.resource,
+            {},
+            async (ctx) => {
+              const tresult: Tx[] = []
+              await applyTrigger(ctx, matches, { trigger, arrays }, tresult)
+              result.push(...tresult)
+            },
+            { count: matches.length, arrays }
           )
         }
       }
     }
-    // Wait all regular triggers to complete in parallel
-    await Promise.all(promises)
-
     return {
       transactions: result,
       performAsync:
@@ -148,7 +164,7 @@ export class Triggers {
             for (const request of asyncRequest) {
               try {
                 await ctx.with(request.trigger.resource, {}, async (ctx) => {
-                  await applyTrigger(ctx, request.matches, request.trigger, result)
+                  await applyTrigger(ctx, request.matches, request, result)
                 })
               } catch (err: any) {
                 ctx.ctx.error('failed to process trigger', {
diff --git a/server/core/src/types.ts b/server/core/src/types.ts
index bde223b5ce..a5ae0cb31e 100644
--- a/server/core/src/types.ts
+++ b/server/core/src/types.ts
@@ -16,6 +16,7 @@
 import {
   MeasureMetricsContext,
   type Account,
+  type Branding,
   type Class,
   type Doc,
   type DocumentQuery,
@@ -40,8 +41,7 @@ import {
   type TxFactory,
   type TxResult,
   type WorkspaceId,
-  type WorkspaceIdWithUrl,
-  type Branding
+  type WorkspaceIdWithUrl
 } from '@hcengineering/core'
 import type { Asset, Resource } from '@hcengineering/platform'
 import { type Readable } from 'stream'
@@ -162,8 +162,8 @@ export interface TriggerControl {
   storageAdapter: StorageAdapter
   serviceAdaptersManager: ServiceAdaptersManager
   // Bulk operations in case trigger require some
-  apply: (tx: Tx[], broadcast: boolean, target?: string[]) => Promise<TxResult>
-  applyCtx: (ctx: SessionOperationContext, tx: Tx[], broadcast: boolean, target?: string[]) => Promise<TxResult>
+  apply: (tx: Tx[], needResult?: boolean) => Promise<TxResult>
+  applyCtx: (ctx: SessionOperationContext, tx: Tx[], needResult?: boolean) => Promise<TxResult>
 
   // Will create a live query if missing and return values immediately if already asked.
   queryFind: <T extends Doc>(
@@ -179,7 +179,7 @@ export interface TriggerControl {
 /**
  * @public
  */
-export type TriggerFunc = (tx: Tx, ctrl: TriggerControl) => Promise<Tx[]>
+export type TriggerFunc = (tx: Tx | Tx[], ctrl: TriggerControl) => Promise<Tx[]>
 
 /**
  * @public
@@ -192,6 +192,9 @@ export interface Trigger extends Doc {
 
   // We should match transaction
   txMatch?: DocumentQuery<Tx>
+
+  // If set trigger will handle Tx[] instead of Tx
+  arrays?: boolean
 }
 
 /**
diff --git a/server/core/src/utils.ts b/server/core/src/utils.ts
index 1d65b82a90..a5cd372a8f 100644
--- a/server/core/src/utils.ts
+++ b/server/core/src/utils.ts
@@ -142,7 +142,8 @@ export class SessionContextImpl implements SessionContext {
     readonly admin: boolean | undefined,
     readonly derived: SessionContext['derived'],
     readonly workspace: WorkspaceIdWithUrl,
-    readonly branding: Branding | null
+    readonly branding: Branding | null,
+    readonly isAsyncContext: boolean
   ) {}
 
   with<T>(
@@ -163,7 +164,8 @@ export class SessionContextImpl implements SessionContext {
             this.admin,
             this.derived,
             this.workspace,
-            this.branding
+            this.branding,
+            this.isAsyncContext
           )
         ),
       fullParams
diff --git a/server/middleware/src/private.ts b/server/middleware/src/private.ts
index 97e0cf45ed..1e76eeaf3d 100644
--- a/server/middleware/src/private.ts
+++ b/server/middleware/src/private.ts
@@ -32,7 +32,7 @@ import platform, { PlatformError, Severity, Status } from '@hcengineering/platfo
 import { Middleware, SessionContext, TxMiddlewareResult, type ServerStorage } from '@hcengineering/server-core'
 import { DOMAIN_PREFERENCE } from '@hcengineering/server-preference'
 import { BaseMiddleware } from './base'
-import { getUser, mergeTargets } from './utils'
+import { getUser } from './utils'
 
 /**
  * @public
@@ -65,12 +65,7 @@ export class PrivateMiddleware extends BaseMiddleware implements Middleware {
         }
       }
     }
-    const res = await this.provideTx(ctx, tx)
-    // Add target to all broadcasts
-    ctx.derived.forEach((it) => {
-      it.target = mergeTargets(target, it.target)
-    })
-    return res
+    return await this.provideTx(ctx, tx)
   }
 
   override async findAll<T extends Doc>(
diff --git a/server/middleware/src/spacePermissions.ts b/server/middleware/src/spacePermissions.ts
index 16f8a07e6b..951a5e8852 100644
--- a/server/middleware/src/spacePermissions.ts
+++ b/server/middleware/src/spacePermissions.ts
@@ -335,10 +335,8 @@ export class SpacePermissionsMiddleware extends BaseMiddleware implements Middle
     await this.processPermissionsUpdatesFromTx(ctx, tx)
     await this.checkPermissions(ctx, tx)
     const res = await this.provideTx(ctx, tx)
-    for (const txd of ctx.derived) {
-      for (const tx of txd.derived) {
-        await this.processPermissionsUpdatesFromTx(ctx, tx)
-      }
+    for (const txd of ctx.derived.txes) {
+      await this.processPermissionsUpdatesFromTx(ctx, txd)
     }
     return res
   }
@@ -347,7 +345,9 @@ export class SpacePermissionsMiddleware extends BaseMiddleware implements Middle
     if (tx._class === core.class.TxApplyIf) {
       const applyTx = tx as TxApplyIf
 
-      await Promise.all(applyTx.txes.map((t) => this.checkPermissions(ctx, t)))
+      for (const t of applyTx.txes) {
+        await this.checkPermissions(ctx, t)
+      }
       return
     }
 
diff --git a/server/middleware/src/spaceSecurity.ts b/server/middleware/src/spaceSecurity.ts
index b709ff757f..3084bef302 100644
--- a/server/middleware/src/spaceSecurity.ts
+++ b/server/middleware/src/spaceSecurity.ts
@@ -46,7 +46,7 @@ import core, {
 import platform, { PlatformError, Severity, Status } from '@hcengineering/platform'
 import { Middleware, SessionContext, TxMiddlewareResult, type ServerStorage } from '@hcengineering/server-core'
 import { BaseMiddleware } from './base'
-import { getUser, isOwner, isSystem, mergeTargets } from './utils'
+import { getUser, isOwner, isSystem } from './utils'
 
 type SpaceWithMembers = Pick<Space, '_id' | 'members' | 'private' | '_class'>
 
@@ -246,10 +246,13 @@ export class SpaceSecurityMiddleware extends BaseMiddleware implements Middlewar
       space: core.space.DerivedTx,
       params: null
     }
-    ctx.derived.push({
-      derived: [tx],
-      target: targets
-    })
+    ctx.derived.txes.push(tx)
+    ctx.derived.targets.security = (it) => {
+      // TODO: I'm not sure it is called
+      if (it._id === tx._id) {
+        return targets
+      }
+    }
   }
 
   private async broadcastNonMembers (ctx: SessionContext, space: SpaceWithMembers): Promise<void> {
@@ -413,17 +416,10 @@ export class SpaceSecurityMiddleware extends BaseMiddleware implements Middlewar
       throw new PlatformError(new Status(Severity.ERROR, platform.status.Forbidden, {}))
     }
     await this.processTx(ctx, tx)
-    const targets = await this.getTxTargets(ctx, tx)
     const res = await this.provideTx(ctx, tx)
-    for (const txd of ctx.derived) {
-      for (const tx of txd.derived) {
-        await this.processTx(ctx, tx)
-      }
+    for (const txd of ctx.derived.txes) {
+      await this.processTx(ctx, txd)
     }
-    ctx.derived.forEach((it) => {
-      it.target = mergeTargets(targets, it.target)
-    })
-
     return res
   }
 
@@ -435,6 +431,7 @@ export class SpaceSecurityMiddleware extends BaseMiddleware implements Middlewar
     for (const tx of txes) {
       const h = this.storage.hierarchy
       if (h.isDerived(tx._class, core.class.TxCUD)) {
+        // TODO: Do we need security check here?
         const cudTx = tx as TxCUD<Doc>
         await this.processTxSpaceDomain(cudTx)
       } else if (tx._class === core.class.TxWorkspaceEvent) {
diff --git a/server/middleware/src/utils.ts b/server/middleware/src/utils.ts
index 8bf0d916f1..d00794aaa4 100644
--- a/server/middleware/src/utils.ts
+++ b/server/middleware/src/utils.ts
@@ -17,18 +17,6 @@ import core, { Account, AccountRole, systemAccountEmail } from '@hcengineering/c
 import platform, { PlatformError, Severity, Status } from '@hcengineering/platform'
 import { SessionContext, type ServerStorage } from '@hcengineering/server-core'
 
-export function mergeTargets (current: string[] | undefined, prev: string[] | undefined): string[] | undefined {
-  if (current === undefined) return prev
-  if (prev === undefined) return current
-  const res: string[] = []
-  for (const value of current) {
-    if (prev.includes(value)) {
-      res.push(value)
-    }
-  }
-  return res
-}
-
 export async function getUser (storage: ServerStorage, ctx: SessionContext): Promise<Account> {
   if (ctx.userEmail === undefined) {
     throw new PlatformError(new Status(Severity.ERROR, platform.status.Forbidden, {}))
diff --git a/server/mongo/src/__tests__/storage.test.ts b/server/mongo/src/__tests__/storage.test.ts
index e190fbd5fd..5f9a36a22b 100644
--- a/server/mongo/src/__tests__/storage.test.ts
+++ b/server/mongo/src/__tests__/storage.test.ts
@@ -182,7 +182,10 @@ describe('mongo operations', () => {
     })
     const soCtx: SessionOperationContext = {
       ctx,
-      derived: [],
+      derived: {
+        txes: [],
+        targets: {}
+      },
       with: async <T>(
         name: string,
         params: ParamsType,
@@ -206,7 +209,6 @@ describe('mongo operations', () => {
         clean: async (domain: Domain, docs: Ref<Doc>[]) => {},
         loadModel: async () => txes,
         getAccount: async () => ({}) as any,
-        measure: async () => async () => ({ time: 0, serverTime: 0 }),
         sendForceClose: async () => {}
       }
       return st
diff --git a/server/ws/src/client.ts b/server/ws/src/client.ts
index dec8eb28b3..9739a415a5 100644
--- a/server/ws/src/client.ts
+++ b/server/ws/src/client.ts
@@ -114,9 +114,13 @@ export class ClientSession implements Session {
           this.token.email,
           this.sessionId,
           this.token.extra?.admin === 'true',
-          [],
+          {
+            txes: [],
+            targets: {}
+          },
           this._pipeline.storage.workspaceId,
-          this._pipeline.storage.branding
+          this._pipeline.storage.branding,
+          false
         )
         await this._pipeline.tx(context, createTx)
         const acc = TxProcessor.createDoc2Doc(createTx)
@@ -144,9 +148,13 @@ export class ClientSession implements Session {
       this.token.email,
       this.sessionId,
       this.token.extra?.admin === 'true',
-      [],
+      {
+        txes: [],
+        targets: {}
+      },
       this._pipeline.storage.workspaceId,
-      this._pipeline.storage.branding
+      this._pipeline.storage.branding,
+      false
     )
     return await this._pipeline.findAll(context, _class, query, options)
   }
@@ -167,9 +175,13 @@ export class ClientSession implements Session {
       this.token.email,
       this.sessionId,
       this.token.extra?.admin === 'true',
-      [],
+      {
+        txes: [],
+        targets: {}
+      },
       this._pipeline.storage.workspaceId,
-      this._pipeline.storage.branding
+      this._pipeline.storage.branding,
+      false
     )
     await ctx.sendResponse(await this._pipeline.searchFulltext(context, query, options))
   }
@@ -183,9 +195,13 @@ export class ClientSession implements Session {
       this.token.email,
       this.sessionId,
       this.token.extra?.admin === 'true',
-      [],
+      {
+        txes: [],
+        targets: {}
+      },
       this._pipeline.storage.workspaceId,
-      this._pipeline.storage.branding
+      this._pipeline.storage.branding,
+      false
     )
 
     const result = await this._pipeline.tx(context, tx)
@@ -209,18 +225,24 @@ export class ClientSession implements Session {
     }
 
     // Put current user as send target
-    toSendTarget.set(this.getUser(), [])
-    for (const txd of context.derived) {
-      if (txd.target === undefined) {
-        getTxes('') // be sure we have empty one
+    for (const txd of context.derived.txes) {
+      let target: string[] | undefined
+      for (const tt of Object.values(context.derived.targets ?? {})) {
+        target = tt(txd)
+        if (target !== undefined) {
+          break
+        }
+      }
+      if (target === undefined) {
+        getTxes('') // Be sure we have empty one
 
         // Also add to all other targeted sends
         for (const v of toSendTarget.values()) {
-          v.push(...txd.derived)
+          v.push(txd)
         }
       } else {
-        for (const t of txd.target) {
-          getTxes(t).push(...txd.derived)
+        for (const t of target) {
+          getTxes(t).push(txd)
         }
       }
     }
diff --git a/server/ws/src/server.ts b/server/ws/src/server.ts
index 004b2b0950..6b335a048f 100644
--- a/server/ws/src/server.ts
+++ b/server/ws/src/server.ts
@@ -912,10 +912,6 @@ class TSessionManager implements SessionManager {
           }
         })
 
-        if (request.method === 'measure' || request.method === 'measure-done') {
-          await this.handleMeasure<S>(service, request, opContext(ctx))
-          return
-        }
         service.requests.set(reqId, {
           id: reqId,
           params: request,
@@ -930,9 +926,7 @@ class TSessionManager implements SessionManager {
         try {
           const params = [...request.params]
 
-          service.measureCtx?.ctx !== undefined
-            ? await f.apply(service, [opContext(service.measureCtx?.ctx), ...params])
-            : await ctx.with('🧨 process', {}, async (callTx) => f.apply(service, [opContext(callTx), ...params]))
+          await ctx.with('🧨 process', {}, async (callTx) => f.apply(service, [opContext(callTx), ...params]))
         } catch (err: any) {
           Analytics.handleError(err)
           if (LOGGING_ENABLED) {
@@ -955,34 +949,7 @@ class TSessionManager implements SessionManager {
       service.requests.delete(reqId)
     }
   }
-
-  private async handleMeasure<S extends Session>(
-    service: S,
-    request: Request<any[]>,
-    ctx: ClientSessionCtx
-  ): Promise<void> {
-    let serverTime = 0
-    if (request.method === 'measure') {
-      service.measureCtx = { ctx: ctx.ctx.newChild('📶 ' + request.params[0], {}), time: Date.now() }
-    } else {
-      if (service.measureCtx !== undefined) {
-        serverTime = Date.now() - service.measureCtx.time
-        service.measureCtx.ctx.end(serverTime)
-        service.measureCtx = undefined
-      }
-    }
-    try {
-      await ctx.sendResponse(request.method === 'measure' ? 'started' : serverTime)
-    } catch (err: any) {
-      Analytics.handleError(err)
-      if (LOGGING_ENABLED) {
-        ctx.ctx.error('error handle measure', { error: err, request })
-      }
-      await ctx.sendError(JSON.parse(JSON.stringify(err?.stack)), unknownError(err))
-    }
-  }
 }
-
 /**
  * @public
  */
diff --git a/server/ws/src/types.ts b/server/ws/src/types.ts
index ac2cc37c40..5e2c4ab496 100644
--- a/server/ws/src/types.ts
+++ b/server/ws/src/types.ts
@@ -77,8 +77,6 @@ export interface Session {
   current: StatisticsElement
   mins5: StatisticsElement
 
-  measureCtx?: { ctx: MeasureContext, time: number }
-
   lastRequest: number
 
   isUpgradeClient: () => boolean