[Webkit-unassigned] [Bug 210640] New: MotionMark class Benchmark has to ensure its _benchmarkStartTimestamp is valid while warming up

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=210640

            Bug ID: 210640
           Summary: MotionMark class Benchmark has to ensure its
                    _benchmarkStartTimestamp is valid while warming up
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sabouhallawa at apple.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

The MotionMark class Benchmark does not set its member _benchmarkStartTimestamp before it finishes warming up. This makes the getter 'timestamp' return NaN if it is called before finishing the warm up. Because of this, MotionMark might encounter a significant regression especially with the first test in the suite: the Multiply test.

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