Comment 77 for bug 1872001

@arighi
It's graphical demo using openGL via SDL1.2 where 1000 small discs move around and all collisions are detected, and print FPS. It uses both CPU and GPU quite heavily. (On my XPS 13 9350, intel_gpu_top reports about 55% GPU usage, and top reports 46% CPU). I was developing this for my research and this is why the hanging bug stroke me strongly.
I made quick tests with the kernels that are currently on my laptop:

5.3.0-48-generic #41+lp1861395v1: 12 FPS
5.3.0-46 9 FPS + Noise (inbetween hangs, of course)
5.3.0-45 12 FPS
5.3.0-42 12 FPS
4.4.0 15 FPS

(aside remark: on my antique desktop PC with Athlon 64 5600 CPU and Radeon HD6450 GPU, the performance is better: 16FPS, which is quite humiliating ;) )