Severe Splitscreen Performance hit. (Open GL)
The performance loss on splitscreen is near 75% or more on most maps for 4 players in GL mode. In software the loss is about 40% which is more what you would expect to see. I don't know if there is any way to optimize this but lowering the graphics settings does not appear to improve the situation. Tested on a Intel Integrated, AMD APU, 1080ti and 3080ti. The performance loss is uniform on all platforms. Going from 700fps down to about 200 on 3080ti and from 120fps to about 28 on the Intel. I will attempt to explore this further and post comments if I can find a possible culprit.