YES! just checked that and you are right. I disabled vsync and here are the results for the scene with the joined geometry:
Display mode set to “Wireframe”.
Command: Testmaxspeed
Time to regen viewport 100 times = 0.67 seconds. (148.81 FPS)
Display mode set to “Shaded”.
Command: Testmaxspeed
Time to regen viewport 100 times = 0.73 seconds. (136.24 FPS)
Display mode set to “Rendered”.
Command: Testmaxspeed
Time to regen viewport 100 times = 2.88 seconds. (34.78 FPS)
Display mode set to “Arctic”.
Command: Testmaxspeed
Time to regen viewport 100 times = 2.50 seconds. (40.00 FPS)
but everything over 60 fps for the viewport isn’t really necessary imo. I’ll check on monday if the amd driver maybe caps at 100, maybe.