254985 2023-04-04 03:22:33 -0700 [GTK] YouTube player -- "Scroll for more details" stutters and uses unreasonably much CPU 2023-04-20 08:16:42 -0700 1 1 1 Unclassified WebKit WebKitGTK WebKit Nightly Build PC Linux NEW P2 Normal --- 245783 1 kdwkleung webkit-unassigned aperez bugs-noreply oldest_to_newest 1946485 0 kdwkleung 2023-04-04 03:22:33 -0700 1. Go to YouTube 2. Play a video 3. Fullscreen 4. Scroll down to the comments section from the fullscreen player 5. Observe heavy stutter and intense CPU usage 6. Exit fullscreen 7. Scroll down to comments section 8. No such problem Tested on WebKitGTK 2.41.1, Epiphany Technology Preview 1946488 1 kdwkleung 2023-04-04 03:32:13 -0700 Scrolling in 'scroll for more details' mode uses about 18-20% CPU, and it simply never comes back down from there, even if the user scrolls back up to the video. The video occasionally stutters. It should be noted that this is even higher than CPU decoding the video (about 13% CPU). The only way to resolve this issue is to close the tab/ web app. 1950027 2 kdwkleung 2023-04-20 05:57:13 -0700 This can now be observed in Gnome Web 44.1/ WebKitGTK 2.40.1