I have been looking into related log performance issues, and I noticed that large logs were very slow in Chrome. In particular, Chrome would hang when scrolling, and show just a blank page until it became responsive again, and selecting text was very delayed. Firefox did not have the same issue. I think the issue was at least partly caused by this bug in Chromium, which was just marked as fixed yesterday. I was able to verify that updating Chrome to a version with the fix for that issue (79.0.3945.130) caused the issues I was experiencing to go away, and for performance to be much closer to Firefox.
Are other users seeing this problem on Firefox, or only in Chrome/Chromium?
They are definitely some other things that should be improved, I just wanted to note that at least some of the problem seems to have been a bug in Chromium that was very recently fixed.