[BUG] Optical flow tool slowdown in 7.7

It seems something went wrong in the 7.7 update. Compared to 7.6 Optical flow tool is waaay too slow in 7.7 .. of course with tested with the same comp.
Don't know if something has changed in the tool without release notes.
Anyone else having the same issue?
Don't know if something has changed in the tool without release notes.
Anyone else having the same issue?