[Webkit-unassigned] [Bug 101787] New: Zoomed-in scrolling is very slow when deviceScaleFactor > 1

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=101787

           Summary: Zoomed-in scrolling is very slow when
                    deviceScaleFactor > 1
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Unspecified
            Status: NEW
          Keywords: InRadar
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: bdakin at apple.com


If you pinch-to-zoom on a retina Mac and try to scroll, it will be very slow. Profiles show that most of the time is spent in CG rendering glyphs.

<rdar://problem/12178726>

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