I get incredibly low performance on 1.16 compared to 1.14.4 (same seed, same rotation almost, same location). It appears especially at high render distances. I have the same allocated RAM. In fact, I have a much higher biome blend value in 1.14. None of my NVIDIA friends have this issue. I need to play at fps higher than 20, please
At 16 render distance in 1.16 on a server I also get 45 fps-ish

Seed was AMD