mirror of
https://github.com/LadybirdBrowser/ladybird.git
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bfd354492e
With this change, we now have ~1200 CellAllocators across both LibJS and LibWeb in a normal WebContent instance. This gives us a minimum heap size of 4.7 MiB in the scenario where we only have one cell allocated per type. Of course, in practice there will be many more of each type, so the effective overhead is quite a bit smaller than that in practice. I left a few types unconverted to this mechanism because I got tired of doing this. :^)
79 lines
3.1 KiB
C++
79 lines
3.1 KiB
C++
/*
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* Copyright (c) 2023, Luke Wilde <lukew@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibWeb/Bindings/PlatformObject.h>
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#include <LibWeb/HTML/WindowOrWorkerGlobalScope.h>
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namespace Web::PerformanceTimeline {
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// https://w3c.github.io/performance-timeline/#dom-performanceobserverinit
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struct PerformanceObserverInit {
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Optional<Vector<String>> entry_types;
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Optional<String> type;
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Optional<bool> buffered;
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};
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// https://w3c.github.io/performance-timeline/#dom-performanceobserver
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class PerformanceObserver final : public Bindings::PlatformObject {
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WEB_PLATFORM_OBJECT(PerformanceObserver, Bindings::PlatformObject);
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JS_DECLARE_ALLOCATOR(PerformanceObserver);
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public:
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enum class ObserverType {
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Undefined,
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Single,
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Multiple,
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};
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static WebIDL::ExceptionOr<JS::NonnullGCPtr<PerformanceObserver>> construct_impl(JS::Realm&, JS::GCPtr<WebIDL::CallbackType>);
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virtual ~PerformanceObserver() override;
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WebIDL::ExceptionOr<void> observe(PerformanceObserverInit& options);
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void disconnect();
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Vector<JS::Handle<PerformanceTimeline::PerformanceEntry>> take_records();
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bool requires_dropped_entries() const { return m_requires_dropped_entries; }
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void unset_requires_dropped_entries(Badge<HTML::WindowOrWorkerGlobalScopeMixin>);
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Vector<PerformanceObserverInit> const& options_list() const { return m_options_list; }
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WebIDL::CallbackType& callback() { return *m_callback; }
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void append_to_observer_buffer(Badge<HTML::WindowOrWorkerGlobalScopeMixin>, JS::NonnullGCPtr<PerformanceTimeline::PerformanceEntry>);
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private:
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PerformanceObserver(JS::Realm&, JS::GCPtr<WebIDL::CallbackType>);
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virtual void initialize(JS::Realm&) override;
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virtual void visit_edges(Cell::Visitor&) override;
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// https://w3c.github.io/performance-timeline/#dfn-observer-callback
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// A PerformanceObserverCallback observer callback set on creation.
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JS::GCPtr<WebIDL::CallbackType> m_callback;
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// https://w3c.github.io/performance-timeline/#dfn-observer-buffer
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// A PerformanceEntryList object called the observer buffer that is initially empty.
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Vector<JS::NonnullGCPtr<PerformanceTimeline::PerformanceEntry>> m_observer_buffer;
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// https://w3c.github.io/performance-timeline/#dfn-observer-type
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// A DOMString observer type which is initially "undefined".
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ObserverType m_observer_type { ObserverType::Undefined };
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// https://w3c.github.io/performance-timeline/#dfn-requires-dropped-entries
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// A boolean requires dropped entries which is initially set to false.
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bool m_requires_dropped_entries { false };
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// https://w3c.github.io/performance-timeline/#dfn-options-list
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// A registered performance observer is a struct consisting of an observer member (a PerformanceObserver object)
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// and an options list member (a list of PerformanceObserverInit dictionaries).
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// NOTE: This doesn't use a separate struct as methods such as disconnect() assume it can access an options list from `this`: a PerformanceObserver.
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Vector<PerformanceObserverInit> m_options_list;
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};
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}
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