245616 2022-09-24 04:46:34 -0700 [GTK4] Overscrolling causes high CPU usage when navigation gestures are not enabled 2023-09-08 13:40:21 -0700 1 1 1 Unclassified WebKit WebKitGTK WebKit Nightly Build PC Linux RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=243924 P2 Normal --- 243924 210100 1 gabmus webkit-unassigned alicem bugs-noreply gabmus mcatanzaro oldest_to_newest 1900853 0 462579 gabmus 2022-09-24 04:46:34 -0700 Created attachment 462579 Minimal bug reproducer As the title says, overscrolling beyond the page limit either up or down causes high CPU usage. This goes away if scrolling back up/down after overscrolling. This does not happen when enabling enable_back_forward_navigation_gestures. It can be reproduced with minibrowser, as well as a minimal reproducer I'm attaching to the issue. To see the issue go away in the reproducer attached uncomment the line saying self.enable_gestures(). 1900855 1 alicem 2022-09-24 04:49:19 -0700 It's reproducible in minibrowser as well, so no need for a separate reproducer at this point. :) 1914415 2 alicem 2022-11-23 19:25:34 -0800 Hm, I can't reproduce this anymore. 1929273 3 mcatanzaro 2023-01-29 06:12:58 -0800 Hopefully fixed by https://commits.webkit.org/259530@main. 462579 2022-09-24 04:46:34 -0700 2022-09-24 04:46:34 -0700 Minimal bug reproducer webkitgtk_overscroll_cpu_usage.py text/x-python 851 gabmus aW1wb3J0IGdpCgpnaS5yZXF1aXJlX3ZlcnNpb24oJ0d0aycsICc0LjAnKQpnaS5yZXF1aXJlX3Zl cnNpb24oJ1dlYktpdDInLCAnNS4wJykKCmZyb20gZ2kucmVwb3NpdG9yeSBpbXBvcnQgR3RrLCBX ZWJLaXQyCgoKY2xhc3MgQXBwKEd0ay5BcHBsaWNhdGlvbik6CiAgICBkZWYgX19pbml0X18oc2Vs Zik6CiAgICAgICAgc3VwZXIoKS5fX2luaXRfXyhhcHBsaWNhdGlvbl9pZD0nb3JnLmdhYm11cy5n ZmVlZHMudGVzdGFwcCcpCiAgICAgICAgc2VsZi53aW5kb3cgPSBHdGsuQXBwbGljYXRpb25XaW5k b3coKQoKICAgIGRlZiBkb19zdGFydHVwKHNlbGYpOgogICAgICAgIEd0ay5BcHBsaWNhdGlvbi5k b19zdGFydHVwKHNlbGYpCiAgICAgICAgc2VsZi5hZGRfd2luZG93KHNlbGYud2luZG93KQoKICAg IGRlZiBkb19hY3RpdmF0ZShzZWxmKToKICAgICAgICBzZWxmLndlYnZpZXcgPSBXZWJLaXQyLldl YlZpZXcoKQogICAgICAgICMgc2VsZi5lbmFibGVfZ2VzdHVyZXMoKQogICAgICAgIHNlbGYud2lu ZG93LnNldF9jaGlsZChzZWxmLndlYnZpZXcpCiAgICAgICAgc2VsZi53ZWJ2aWV3LmxvYWRfdXJp KCdodHRwczovL3dlYmtpdC5vcmcnKQogICAgICAgIHNlbGYud2luZG93LnByZXNlbnQoKQoKICAg IGRlZiBlbmFibGVfZ2VzdHVyZXMoc2VsZik6CiAgICAgICAgc2VsZi53ZWJraXRfc2V0dGluZ3Mg PSBXZWJLaXQyLlNldHRpbmdzKAogICAgICAgICAgICBlbmFibGVfYmFja19mb3J3YXJkX25hdmln YXRpb25fZ2VzdHVyZXM9VHJ1ZQogICAgICAgICkKICAgICAgICBzZWxmLndlYnZpZXcuc2V0X3Nl dHRpbmdzKHNlbGYud2Via2l0X3NldHRpbmdzKQoKCmFwcCA9IEFwcCgpCmFwcC5ydW4oKQo=