For some reason the asteroid demo only gives 10 fps with GPU Instancer on and even less with it off. I've run the demo at 60 fps before. Not sure if its because I updated GPUI or if it's because I'm using unity 2021.1.5f1. Build FPS is the same as editor. For my game the fps difference is like nothing now. It used to be a huge difference. The screenshots are of the prefab manager enabled vs enabled.