[Webkit-unassigned] [Bug 150698] New: Animometer computes frame rate incorrectly

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=150698

            Bug ID: 150698
           Summary: Animometer computes frame rate incorrectly
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: simon.fraser at apple.com
                CC: lforschler at apple.com

The Animator.animate() function tests if (this._frameCount == this._dropFrameCount) before incrementing this._frameCount, causing it to store the wrong this._measureTimeOffset. This causes it to report 90fps when it's actually doing 60fps.

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