It turns out this blog post is a great benchmark on Fedora 42's Wayland GNOME 48 session (on any of my computers, whether it's the old AMD Radeon GPU or with the fast Intel-based laptop), with Epiphany 48.x (from Fedora), Epiphany Tech Preview or MiniBrowser from Fedora: https://feaneron.com/2025/08/05/guadec-2025/ To observe the symptoms, try to scroll with: * A mouse's scrollwheel * A touchpad's kinetic scroll (i.e. gesture quickly) * If none of the above trigger the issue, grab it by the scrollbar (click and hold the scrollbar, move the page up and down) The symptoms is that when it encounters big images, especially the first picture of the GNOME Calendar keychain trinkets, * It will be noticeably not smooth * In the case of touchpad kinetic scroll, it will stop/block the scroll