[Webkit-unassigned] [Bug 78942] New: Coalesce composited layers if applicable

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=78942

           Summary: Coalesce composited layers if applicable
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: wangxianzhu at chromium.org
                CC: jamesr at chromium.org, vangelis at chromium.org,
                    klobag at chromium.org, wiltzius at chromium.org


Try to coalesce some composited layers. If subtree compositing flag is off, and the layer is fully inside the ancestor, there is no need to do the overlap test. This will reduce a lot of sub layers. --klobag

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