[Webkit-unassigned] [Bug 195729] New: Optimize AsyncScrollingCoordinator::applyScrollingTreeLayerPositions() to do no work if no scrolling happened

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=195729

            Bug ID: 195729
           Summary: Optimize
                    AsyncScrollingCoordinator::applyScrollingTreeLayerPosi
                    tions() to do no work if no scrolling happened
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Scrolling
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: simon.fraser at apple.com

AsyncScrollingCoordinator::applyScrollingTreeLayerPositions should do nothing if there was no scrolling tree change since the last apply, just to avoid extra work.

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