I revised the same file on an old laptop with GTX 980M card which had a much better (real time) performance.
Non-hybrid graphics.
Primary display and OpenGL: NVIDIA GeForce GTX 980M (NVidia) Memory: 8GB, Driver date: 4-3-2020 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 445.87
So I assume the poor performance on the RTX 2080 is coused by a certain setting.
Any Idea what could couse the problem?