225621 2021-05-10 16:42:50 -0700 Incredibly poor scrolling performance while loading other parts of website 2023-03-28 05:25:18 -0700 1 1 1 Unclassified WebKit WebKitGTK Other PC Linux RESOLVED FIXED P2 Normal --- 1 kdwkleung webkit-unassigned bugs-noreply webkit-bug-importer oldest_to_newest 1758714 0 kdwkleung 2021-05-10 16:42:50 -0700 On some sites, like reddit.com, performance is extremely poor. As can be seen in screencast attached, simply scrolling on reddit.com results in extremely low frame rates (like 1-2 fps). I did some more investigation and found that performance on websites that continuously loads images and videos as part of an infinity scroll feed. Another example would be YouTube when loading the thumbnail of recommended videos Firefox handles this just fine. Note: I am not using a touchpad, but Surface Arc Mouse, which still uses steppy scroll.