[Webkit-unassigned] [Bug 72190] New: [Chromium] Repaints always required with fixed elements and compositing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=72190

           Summary: [Chromium] Repaints always required with fixed
                    elements and compositing
           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: simonjam at chromium.org
                CC: jchaffraix at webkit.org, jamesr at chromium.org,
                    vangelis at chromium.org, enne at google.com,
                    nduca at chromium.org


Created an attachment (id=114783)
 --> (https://bugs.webkit.org/attachment.cgi?id=114783&action=review)
Reduced test case

This is a super simple test case, but it's a reduction of cnet.com scrolling slowly. Basically, any fixed element is causing us to repaint everything underneath it while scrolling.

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