[Webkit-unassigned] [Bug 102617] New: Add a 'has flipped blocks' bit to RenderLayer so we can avoid a RenderObject walk in RenderGeometryMap

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=102617

           Summary: Add a 'has flipped blocks' bit to RenderLayer so we
                    can avoid a RenderObject walk in RenderGeometryMap
           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: simon.fraser at apple.com
                CC: koivisto at iki.fi


canMapBetweenRenderers() has to walk renderers looking for flipped blocks, which is unfortunate because this slows down the layer->layer mapping optimization there.

A bit on RenderLayer that says "hasFlippedBlocks contents" would help.

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