Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 61765172c90f84f2b7718f95afac51a5ee54dc10
https://github.com/WebKit/WebKit/commit/61765172c90f84f2b7718f95afac51a5ee54dc10
Author: Tyler Wilcock <[email protected]>
Date: 2026-04-27 (Mon, 27 Apr 2026)
Changed paths:
M Source/WebCore/accessibility/AXObjectCache.cpp
M Source/WebCore/accessibility/AXObjectCache.h
M Source/WebCore/accessibility/AccessibilityNodeObject.cpp
M Source/WebCore/accessibility/AccessibilityObject.cpp
M Source/WebCore/accessibility/AccessibilityObject.h
M Source/WebCore/accessibility/AccessibilityObjectInlines.h
Log Message:
-----------
AX: ownerParentObject() shows up heavily in samples on Speedometer despite
not using aria-owns
https://bugs.webkit.org/show_bug.cgi?id=313370
rdar://175637709
Reviewed by Joshua Hoffman.
Per https://chromestatus.com/metrics/feature/timeline/popularity/2101, 86% of
all pages (including those in Speedometer)
do not use aria-owns a single time, so this commit adds a fast-path exit in
ownerParentObject() to speed up these page loads.
We do this by tracking a bool indicating whether there are any
owns-relationships, using said bool to early-exit if
none are present. This speeds up tree updates, resulting in a 1.79% improvement
in Speedometer with accessibility enabled.
This is so beneficial because parentObject() is one of our most frequently
called functions, so any speedup goes far.
* Source/WebCore/accessibility/AXObjectCache.cpp:
(WebCore::AXObjectCache::getOrCreateIsolatedTree):
(WebCore::AXObjectCache::addRelation):
(WebCore::AXObjectCache::updateRelationsIfNeeded):
* Source/WebCore/accessibility/AXObjectCache.h:
* Source/WebCore/accessibility/AccessibilityNodeObject.cpp:
(WebCore::AccessibilityNodeObject::ownerParentObject const):
* Source/WebCore/accessibility/AccessibilityObject.cpp:
(WebCore::AccessibilityObject::insertChild):
* Source/WebCore/accessibility/AccessibilityObject.h:
* Source/WebCore/accessibility/AccessibilityObjectInlines.h:
(WebCore::AccessibilityObject::anyObjectHasAriaOwns const):
Canonical link: https://commits.webkit.org/312093@main
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