[Webkit-unassigned] [Bug 77401] New: runner.js for performance test should use use Bessel's correction

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=77401

           Summary: runner.js for performance test should use use Bessel's
                    correction
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rniwa at webkit.org
                CC: eric at webkit.org, abarth at webkit.org, morrita at google.com


It's kind of bogus to use standard deviation for sample size smaller than 20 (for most tests). We should use some unbiased estimates for standard deviation. As a starter, we can use Bessel's correction.

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