https://bugzilla.kernel.org/show_bug.cgi?id=90741
--- Comment #45 from Gustaw Smolarczyk wielkiegie@gmail.com --- (In the end I had to use mdelay(50))
The performance was really traumatic (8-11fps). But on a positive side, there seemed to be no pauses. There was one moment when fps dropped to 0 (for ~1/3 of a second), but it may have been due to completely different reason.