Safari unusably choppy scrolling after upgrade to macOS 12.1

Hi,

Ever since I upgraded to macOS 12.1, Safari (15.2) is basically unusuable. It often takes anywhere between half a second and a full second until scrolling has any effect, regardless of whether I use the mouse or the keyboard.

I don't use any extensions. CPU and memory usage is normal. I tried deleting all history and site data to no avail. It doesn't seem to matter what site I'm on.

Has anyone seen this and found a solution?