Bug 292474

Summary:	[JSC] Support JIT compiling for `String#at` by ThunkGenerators
Product:	WebKit	Reporter:	Sosuke Suzuki <sosuke>
Component:	JavaScriptCore	Assignee:	Sosuke Suzuki <sosuke>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Sosuke Suzuki

Reported 2025-05-02 19:09:28 PDT

This patch changes to support JIT compiling for `String#at` by ThunkGenerators. Mircobenchmark results with `useDFGJIT=0`: TipOfTree Patched string-prototype-at-negative-index 5.6976+-0.1307 ^ 4.2518+-0.1516 ^ definitely 1.3400x faster string-prototype-at-positive-index 6.3179+-1.4795 ^ 3.9806+-0.0536 ^ definitely 1.5872x faster

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Sosuke Suzuki

Comment 1 2025-05-02 19:10:06 PDT

Pull request: https://github.com/WebKit/WebKit/pull/44883

Radar WebKit Bug Importer

Comment 2 2025-05-09 19:10:13 PDT

<rdar://problem/151050354>

EWS

Comment 3 2025-05-13 05:59:51 PDT

Committed 294841@main (9d0551175483): <https://commits.webkit.org/294841@main> Reviewed commits have been landed. Closing PR #44883 and removing active labels.

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