Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 72a6facdf6de1a86c14271fb02904443ebacd159
https://github.com/WebKit/WebKit/commit/72a6facdf6de1a86c14271fb02904443ebacd159
Author: Chris Dumez <[email protected]>
Date: 2026-04-02 (Thu, 02 Apr 2026)
Changed paths:
M Source/JavaScriptCore/parser/Lexer.cpp
Log Message:
-----------
[JSC] Use makeLatin1Identifier in parseString SIMD fast path
https://bugs.webkit.org/show_bug.cgi?id=311322
Reviewed by Yusuke Suzuki.
The parseString SIMD fast path for Lexer<char16_t> already guarantees
all characters are Latin1 (non-Latin1 triggers fallback to the slow
case), but was calling makeIdentifier which stores the string as
16-bit. Use makeLatin1Identifier instead to create an 8-bit backed
string, halving memory usage for these string literals.
For Lexer<Latin1Character>, the overload resolves to the same
m_arena->makeIdentifier call as before, so no behavior change.
* Source/JavaScriptCore/parser/Lexer.cpp:
(JSC::Lexer<T>::parseString):
Canonical link: https://commits.webkit.org/310426@main
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