[Webkit-unassigned] [Bug 41019] New: Canvas: Remember verified clean origins for drawImage()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=41019

           Summary: Canvas: Remember verified clean origins for
                    drawImage()
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: Performance
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: andreas.kling at nokia.com


This canvas game:
http://www.watersheep.org/~markh/html_canvas/game.html

..is doing a ton of drawImage() calls, and 25% of that time is spent checking that the image URL's don't taint the canvas.

Simply caching the KURL's of verified origins helps performance a lot.

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