[Webkit-unassigned] [Bug 20974] New: 1.4% speedup on SunSpider and V8

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=20974

           Summary: 1.4% speedup on SunSpider and V8
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: oszi at inf.u-szeged.hu


I created a profile with GNU gprof, and founded out that JSC::fastIsNumber()
takes 4.96%/6.03% of SunSpider runtime on Linux platform at r36540
(non-CTI/CTI). I suprised, because this frequent function hasn't ALWAYS_INLINE
modifier.

With ALWAYS_INLINE modifier It looks good:
1.40% speedup on Sunspider, 1.44% on V8 (Linux, non-CTI version, r36738)
2.91% speedup on SunSpider, 0.75% on V8 (Linux, CTI verison, r36540)

(Unfortunately CTI not works currently on linux platform.)


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