XWayland is limited to 58 fps (2 frames below monitor refresh rate) on Nvidia hardware
I'm using a GTX 1070 so accelerated XWayland is new for me and I'm not sure if this might be a general XWayland issue but I imagine it isn't. I first noticed this after testing a few emulators, specifically Dolphin, BSNES, and DuckStation. All seem to be limiting themselves to 58 fps at least most of the time. When I resize a window or mess with other parts of the UIs, the fps will generally go to 57 for a second, then up to 59 or 60 for another second, then settle at 58 fps again. I just decided to launch some Steam games with Steam's FPS counter on and the same is happening there.