[Webkit-unassigned] [Bug 20180] New: Firefox is faster than webkit on :nth-child tests on SlickSpeed

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=20180

           Summary: Firefox is faster than webkit on :nth-child tests on
                    SlickSpeed
           Product: WebKit
           Version: 526+ (Nightly build)
          Platform: Macintosh
               URL: http://webkit.org/perf/slickspeed
        OS/Version: Mac OS X 10.5
            Status: NEW
          Keywords: Performance
          Severity: Normal
          Priority: P2
         Component: HTML DOM
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: catfish.man at gmail.com


Firefox numbers (nightly build downloaded July 26th): 
div:nth-child(even)     25 ms | 106 found
div:nth-child(2n)               26 ms | 106 found
div:nth-child(odd)      26 ms | 137 found
div:nth-child(2n+1)     26 ms | 137 found
div:nth-child(n)                27 ms | 243 found

WebKit numbers (r35363 + patch to fix id optimization)
div:nth-child(even)     37 ms | 106 found
div:nth-child(2n)               66 ms | 106 found
div:nth-child(odd)      38 ms | 137 found
div:nth-child(2n+1)     61 ms | 137 found
div:nth-child(n)                54 ms | 243 found


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