Bug 308827

Summary:	PGO Migration from Frontend to IR
Product:	WebKit	Reporter:	h243jian
Component:	New Bugs	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	rreno, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

h243jian

Reported 2026-02-27 09:50:21 PST

Currently WebKit PGO is using frontend instrumentation enabled by CLANG_INSTRUMENT_FOR_OPTIMIZATION_PROFILING which passes -fprofile-instr-generate to the compiler invocation. Migration to IR PGO gives a nice performance progression.

Attachments
Add attachment proposed patch, testcase, etc.

Henry Jiang

Comment 1 2026-02-27 09:57:17 PST

Pull request: https://github.com/WebKit/WebKit/pull/59585

Radar WebKit Bug Importer

Comment 2 2026-02-27 12:49:49 PST

<rdar://problem/171380240>

EWS

Comment 3 2026-02-27 15:33:19 PST

Committed 308370@main (fd4a28e3df08): <https://commits.webkit.org/308370@main> Reviewed commits have been landed. Closing PR #59585 and removing active labels.

Note You need to log in before you can comment on or make changes to this bug.