Comment 77 for bug 1833281

(In reply to howaboutsynergy from comment #55)
> On an unrelated note(but since btrfs was thought to be a problem at some
> point), I've discovered that btrfs with zstd:5 (or worse zstd:15) can cause
> (at least) mouse cursor stuttering(like it was skipping frames), while
> zstd:1 doesn't(likely because of the low CPU usage during compression),
> regardless of how fast/many writes are happening on the SSD(2-6M/s with
> zstd:15, 38-50+M/s with zstd:1), apparently due to high CPU usage during the
> compression. (zstd unspecified means zstd:3 aka default)

I tried to move Chromium cache from btrfs to tmpfs, nothing became better, seems that Load Average became even a bit bigger in peacks (regrading what is described in comment#51).