[Webkit-unassigned] [Bug 70588] New: Bencher script doesn't measure GC times accurately

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=70588

           Summary: Bencher script doesn't measure GC times accurately
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: fpizlo at apple.com


The bencher script runs benchmarks using the SunSpider harness style, where gc() is invoked between samples.  This means that GC times tend to not be measured.  But particularly SunSpider and V8 have significant GC pressure when run repeatedly.  The bencher script should retain its default mode (since it's great for pinpointing performance changes in the mutator) but have options to also measure GC times.

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