[Webkit-unassigned] [Bug 180025] New: Avoid traversing the layer/render tree multiple times when painting the different phases

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=180025

            Bug ID: 180025
           Summary: Avoid traversing the layer/render tree multiple times
                    when painting the different phases
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sabouhallawa at apple.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

One way to optimize the paintings lashes is to have the renderers paint themselves into intermediate display lists. Once the painting to the display lists finishes, these display lists will be played back to the painting GraphicsContext in the  order of the painting phases.

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