i have this problem on Firefox and Chrome (Linux), and also on different gitlab instances (multiple private ones but also public):
In large MRs (means: Add e.g. a very large text file to an MR), the scrolling over the whole diff is very slow.
Clicking at a line in order to comment it opens the text input after a few seconds, and then the typing gives a very bad, slow experience: i can watch my text being typed in after i pressed the sequence of keyboard keys that leads to my intended text input.
Loading with a fresh firefox profile without extensions etc. changes nothing.
Has anyone experienced anything similar?