[Webkit-unassigned] [Bug 22916] New: Fix O(n^2) clip rects computation when painting deep reflection content

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=22916

           Summary: Fix O(n^2) clip rects computation when painting deep
                    reflection content
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: simon.fraser at apple.com


Bug 22570 fixed issues with cached clip rects and reflection painting by
computing the clip rects on the fly when painting reflections (which has to be
done because there's a temporary shift in the rootLayer).

However, while painting that reflected content, each layer is going to
recompute its clip rects all the way from the root, which is O(n^2).


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