[Webkit-unassigned] [Bug 253725] New: Add <functional> to precompiled header set

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=253725

            Bug ID: 253725
           Summary: Add <functional> to precompiled header set
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: bfulgham at webkit.org

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.

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