I can confirm the issue (I am on ubuntu 22.04 nvidia + x11). gnome-terminal, emacs and similar applications was lagging. Starting an application that updated the screen continuously (such as glxgears) seems to have alleviated the problem.
Downgrading mutter to from 42.9-0ubuntu7 (which I got in the latest upgrade yesterday) to 42.0-3ubuntu2 (release, which was easy to get hold of) seems to have fixed the problem.
I can confirm the issue (I am on ubuntu 22.04 nvidia + x11). gnome-terminal, emacs and similar applications was lagging. Starting an application that updated the screen continuously (such as glxgears) seems to have alleviated the problem.
Downgrading mutter to from 42.9-0ubuntu7 (which I got in the latest upgrade yesterday) to 42.0-3ubuntu2 (release, which was easy to get hold of) seems to have fixed the problem.