diff --git a/conf.d/_tide_init.fish b/conf.d/_tide_init.fish
index e80ad81..50d79d5 100644
--- a/conf.d/_tide_init.fish
+++ b/conf.d/_tide_init.fish
@@ -1,16 +1,22 @@
 function _tide_init_install --on-event _tide_init_install
-    _set_immutable _tide_color_dark_blue 0087AF
-    _set_immutable _tide_color_dark_green 5FAF00
-    _set_immutable _tide_color_gold D7AF00
-    _set_immutable _tide_color_green 5FD700
-    _set_immutable _tide_color_light_blue 00AFFF
+    set -U _tide_var_list
+    
+    # Tiny improvment to shell startup, which makes async faster
+    function _tide_set -a var_name
+        set -U $var_name $argv[2..-1]
+        set -a _tide_var_list $var_name
+    end
+
+    _tide_set _tide_color_dark_blue 0087AF
+    _tide_set _tide_color_dark_green 5FAF00
+    _tide_set _tide_color_gold D7AF00
+    _tide_set _tide_color_green 5FD700
+    _tide_set _tide_color_light_blue 00AFFF
 
     # Each string replace is kind of dirname
-    _set_immutable _tide_root (status current-filename | string replace --regex '/[^/]+$' '' | string replace --regex '/[^/]+$' '')
+    _tide_set _tide_root (status current-filename | string replace --regex '/[^/]+$' '' | string replace --regex '/[^/]+$' '')
 
-    _set_immutable VIRTUAL_ENV_DISABLE_PROMPT true
-
-    set -U _tide_var_list
+    _tide_set VIRTUAL_ENV_DISABLE_PROMPT true
 
     source $_tide_root/functions/tide/configure/choices/all/style.fish
     _load_config 'lean'
@@ -30,16 +36,10 @@ function _tide_init_install --on-event _tide_init_install
 end
 
 function _tide_init_uninstall --on-event _tide_init_uninstall
-    for var in $_tide_var_immutable_list $_tide_var_list
+    for var in $_tide_var_list
         set -e $var
     end
-    set -e _tide_var_immutable_list
     set -e _tide_var_list
 
     functions --erase (functions --all | string match --entire --regex '^_tide_')
 end
-
-function _set_immutable -a var_name
-    set -U $var_name $argv[2..-1]
-    set -Ua _tide_var_immutable_list $var_name
-end