Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 09f6a02b04a433e6006675390914d4876e27aef5
https://github.com/WebKit/WebKit/commit/09f6a02b04a433e6006675390914d4876e27aef5
Author: Chris Dumez <[email protected]>
Date: 2026-04-01 (Wed, 01 Apr 2026)
Changed paths:
M Source/WebCore/css/CSSSelector.cpp
Log Message:
-----------
Avoid heap allocation in CSSSelector::visitSimpleSelectors()
https://bugs.webkit.org/show_bug.cgi?id=311260
Reviewed by Darin Adler and Sam Weinig.
Replace std::queue (backed by std::deque, which heap-allocates) with
a Deque<..., 16> with inline capacity of 16 to preserve BFS traversal
order while avoiding heap allocation for typical selector trees. I have
verified that this avoids heap allocation on Speedometer 3.
Also remove an unnecessary const_cast — the VisitFunctor already takes
`const CSSSelector&`.
* Source/WebCore/css/CSSSelector.cpp:
(WebCore::CSSSelector::visitSimpleSelectors const):
Canonical link: https://commits.webkit.org/310411@main
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