[Webkit-unassigned] [Bug 249912] 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

--- Comment #2 from Michael Catanzaro <mcatanzaro at gnome.org> ---
Created attachment 464895

  --> https://bugs.webkit.org/attachment.cgi?id=464895&action=review

Demonstration screencast

Here's a video demonstrating the bug. During this video, I press and hold the down arrow on my keyboard, so the view should only ever scroll down, never up. We see the view hang at 1 second and scroll back to the top of the page at 5 seconds, even though it should only ever go down.

Here I'm compiling WebKit in the background, so the effect in this video is exaggerated due to the lag. Normally the effect is less severe than this, but it still happens to a lesser extent when my computer is under no strain.

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