[Webkit-unassigned] [Bug 102272] New: [Skia] Deferred SkCanvas save()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=102272

           Summary: [Skia] Deferred SkCanvas save()
           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: fmalita at chromium.org
                CC: reed at google.com, senorblanco at chromium.org,
                    junov at google.com, pdr at google.com,
                    schenney at chromium.org


Certain patterns in the Skia command stream (observable in captured SKPs for instance) contain redundant save/restore pairs.

This bug is for investigating a lazy PlatformContextSkia save() strategy, where the actually canvas operation is deferred until a clip/matrix change is observed (as opposed to the current approach where the save is performed upfront, on GraphicsContext::save()). Experiments show that this would yield a 1-20% save/restore reduction for regular/html pages, with much higher gains possible for SVG content.

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