[Webkit-unassigned] [Bug 73454] New: [chromium] When rendering goes idle, do not count that time against frame rate

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=73454

           Summary: [chromium] When rendering goes idle, do not count that
                    time against frame rate
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: nduca at chromium.org
                CC: nduca at chromium.org


The CCHeadsUpDisplay currently computes FPS based on timestamps between CCLayerTreeHostImpl::present() calls. This is a decent approximation of frame rate when rendering is happening, but when there is no screen damage for a few seconds, we treat that as a very very long frame. This leads to bad frame rate measurements.

We should fix this, somehow. Whoever picks this bug up, shout at me and we can brainstorm.

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