[Webkit-unassigned] [Bug 6219] New: Perf regression: -[NSImage initWithData:] called repeatedly while moving the cursor over an image

[bugzilla-daemon at opendarwin.org]

http://bugzilla.opendarwin.org/show_bug.cgi?id=6219

           Summary: Perf regression: -[NSImage initWithData:] called
                    repeatedly while moving the cursor over an image
           Product: WebKit
           Version: 412+
          Platform: Macintosh
        OS/Version: Mac OS X 10.4
            Status: NEW
          Severity: normal
          Priority: P2
         Component: WebKit Misc.
        AssignedTo: webkit-unassigned at opendarwin.org
        ReportedBy: opendarwin.org at mitzpettel.com
                CC: darin at apple.com


Each call to -[WebView elementAtPoint:] for a point inside an image entails a call to -[NSImage 
initWithData:] to fill the WebElementImageKey. This results in pretty high CPU usage when simply moving 
the mouse cursor across a big image. See the testcase for example.

I think this started with the changes to QPixmap when bug 5689 was fixed.

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