[Webkit-unassigned] [Bug 249912] New: REGRESSION(256929 at main?): Extremely poor keyboard scrolling performance on various websites

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=249912

            Bug ID: 249912
           Summary: REGRESSION(256929 at main?): Extremely poor keyboard
                    scrolling performance on various websites
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mcatanzaro at gnome.org
                CC: bugs-noreply at webkitgtk.org

WebKitGTK 2.39.3 suffers from extremely poor keyboard scrolling performance on various websites. Whenever this happens, the scrolling lags for a bit, then the page content disorientingly jumps too far after it recovers. E.g. say I'm holding the down arrow key for four seconds, and the page scrolls down slowly at first, then when WebKit seems to "recover" from the lag it will instantly scroll down too far. Then I have to use the up arrow key to scroll back up, and hope I don't overshoot when the page content jumps again.

I haven't checked yet to be certain, but I suspect it's probably a regression from 256929 at main.

Test page: https://thepointsguy.com/news/southwest-airlines-christmas-meltdown/

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