Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 1dff2312b262450f33a2a8b4f4a2f1008e60be63
https://github.com/WebKit/WebKit/commit/1dff2312b262450f33a2a8b4f4a2f1008e60be63
Author: Sosuke Suzuki <[email protected]>
Date: 2026-06-25 (Thu, 25 Jun 2026)
Changed paths:
M Source/JavaScriptCore/parser/Parser.cpp
Log Message:
-----------
[JSC] Create a save point in `parseAssignmentExpression` only when it may be
consumed
https://bugs.webkit.org/show_bug.cgi?id=317710
Reviewed by Yusuke Suzuki.
Similar to 315637@main. Parser::parseAssignmentExpression unconditionally
creates
a save point, but it is consumed only when re-parsing as an arrow function
(maybeValidArrowFunctionStart) or as a destructuring pattern
(maybeAssignmentPattern).
For expressions starting with a numeric/string/template/regexp literal or a
unary
operator, both flags are false and the ~100 byte parser/lexer state copy is
wasted.
Since this function runs once per assignment expression (array elements, call
arguments, etc.), skip the copy when neither flag is set.
* Source/JavaScriptCore/parser/Parser.cpp:
(JSC::Parser<LexerType>::parseAssignmentExpression):
Canonical link: https://commits.webkit.org/315801@main
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