[webkit-changes] [WebKit/WebKit] 52e75d: [GPU Process] Disable GPU Process on 2-core macOS ...

[Simon Fraser]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 52e75d6babbd5457eb901247c16430869be4d23f
      https://github.com/WebKit/WebKit/commit/52e75d6babbd5457eb901247c16430869be4d23f
  Author: Simon Fraser <simon.fraser at apple.com>
  Date:   2023-05-13 (Sat, 13 May 2023)

  Changed paths:
    M Source/WTF/Scripts/Preferences/UnifiedWebPreferences.yaml
    M Source/WTF/wtf/NumberOfCores.cpp
    M Source/WTF/wtf/NumberOfCores.h
    M Source/WebKit/Shared/WebPreferencesDefaultValues.cpp
    M Source/WebKit/Shared/WebPreferencesDefaultValues.h
    M Source/WebKit/UIProcess/mac/WebViewImpl.mm

  Log Message:
  -----------
  [GPU Process] Disable GPU Process on 2-core macOS devices
https://bugs.webkit.org/show_bug.cgi?id=256681
rdar://109234446

Reviewed by Chris Dumez.

Disable UI-side compositing and GPU Process by default on 2-core macOS devices, for performance reasons.

* Source/WTF/Scripts/Preferences/UnifiedWebPreferences.yaml:
* Source/WTF/wtf/NumberOfCores.cpp:
(WTF::numberOfPhysicalProcessorCores): New function to get the number of physical cores. Currently
only has an implementation that works for Darwin OSes.
* Source/WTF/wtf/NumberOfCores.h:
* Source/WebKit/Shared/WebPreferencesDefaultValues.cpp:
(WebKit::defaultUseGPUProcessForDOMRenderingEnabled):
* Source/WebKit/Shared/WebPreferencesDefaultValues.h:
* Source/WebKit/UIProcess/mac/WebViewImpl.mm:
(WebKit::WebViewImpl::WebViewImpl):

Canonical link: https://commits.webkit.org/264056@main