Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 8c357cd24a0e0e181d09dadd6f08fbb8fc93aa86
https://github.com/WebKit/WebKit/commit/8c357cd24a0e0e181d09dadd6f08fbb8fc93aa86
Author: Andres Gonzalez <[email protected]>
Date: 2024-03-12 (Tue, 12 Mar 2024)
Changed paths:
M Source/WebCore/accessibility/AccessibilityNodeObject.cpp
Log Message:
-----------
AX: AccessibilityNodeObject::determineAccessibilityRoleFromNode makes many
unnecessary dynamicDowncasts.
https://bugs.webkit.org/show_bug.cgi?id=270854
<rdar://problem/124455559>
Reviewed by Tyler Wilcock.
This is a hot method in ITM that calls many times Node::hasTagName(const
HTMLQualifiedName&), which in turn dynamicDowncasts the Node to an HTMLElement.
This patch reduces the number of dynamicDowncasts significantly by downcasting
to an HTMLElement upfront and calling HTMLElement::hasTagName directly instead.
In a run of LayoutTests/accessibility, the number of downcasts drops by 1978248
or 13% of the original number.
* Source/WebCore/accessibility/AccessibilityNodeObject.cpp:
(WebCore::AccessibilityNodeObject::determineAccessibilityRoleFromNode const):
Canonical link: https://commits.webkit.org/276000@main
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