Bug 253725

Summary:	Add <functional> to precompiled header set
Product:	WebKit	Reporter:	Brent Fulgham <bfulgham>
Component:	WebKit Misc.	Assignee:	Brent Fulgham <bfulgham>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Brent Fulgham 2023-03-10 11:14:36 PST

One of the most costly headers across the build is boyer_moore_searcher.h, which is used inside <functional>. The file is included 2499 times.

Before the proposed change:

**** Time summary:
Compilation (10226 times):
  Parsing (frontend):         9479.2 s
  Codegen & opts (backend):   3429.0 s

With the change:

**** Time summary:
Compilation (10196 times):
  Parsing (frontend):         9312.7 s
  Codegen & opts (backend):   3316.7 s


Roughly a savings of 2.75 CPU minutes in parsing, and close to 2 CPU minutes in codegen.

Comment 1 Radar WebKit Bug Importer 2023-03-10 11:15:52 PST

<rdar://problem/106562509>

Comment 2 Brent Fulgham 2023-03-10 11:19:13 PST

Pull request: https://github.com/WebKit/WebKit/pull/11374

Comment 3 EWS 2023-03-10 15:02:13 PST

Committed 261531@main (1f6f5b1e5d87): <https://commits.webkit.org/261531@main>

Reviewed commits have been landed. Closing PR #11374 and removing active labels.