The answear is 42! Weird performance issue on android

I have a very simple test project where 110 game cards rotate on the screen. I was doing some optimization when I realized, that when I set Application.targetFrameRate to 42 I get something about 200-100fps in profiler, and when I set it to 43 I get around 30fps in profiler. Douglas Adams must be still alive…

Anyway - any thoughts what can possibly happen? I attach profiler screen-shot. On the left is targetFrameRate set to 42 and on the right 43.

What happens if you set it something normal, like = 60?

There is no noticable difference between 43 and 60 - I get around 30 fps. Also setting targetFrameRate to 30 gives 30 fps which is also weird.

If you can reliably reproduce this on a simple scene, please do a bug report.