[Webkit-unassigned] [Bug 11576] New: .25% performance regression on JS iBench due to JSImmediate changes

[bugzilla-daemon at webkit.org]

http://bugs.webkit.org/show_bug.cgi?id=11576

           Summary: .25% performance regression on JS iBench due to
                    JSImmediate changes
           Product: WebKit
           Version: 420+ (nightly)
          Platform: Macintosh
        OS/Version: Mac OS X 10.4
            Status: NEW
          Severity: Normal
          Priority: P1
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at opendarwin.org
        ReportedBy: ggaren at apple.com
                CC: mjs at apple.com, ap at webkit.org, dgibson77 at gmail.com


Platform compatibility changes to JSImmediate.h between r17372 and r17740
caused a .25% performance regression on JS iBench. I ran the test twice.

I suspect either that something is no longer being inlined, or that something
that used to be a compile-time constant is now a run-time lookup.


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