RESOLVED FIXED308827
PGO Migration from Frontend to IR 
https://bugs.webkit.org/show_bug.cgi?id=308827
Summary PGO Migration from Frontend to IR
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.
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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.
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