To make sure the display stays responsive, we've been tracking how changes affect its performance.

Procedure

Build with --release. Test on Chromium with VSCodium, gedit, and the AMDGPU_TOP GUI running, and all other programs closed. In case it matters, keep the display prototype fully visible on the right half of the screen, with the AMDGPU_TOP plots visible on the left half. Start the turntable and then monitor AMDGPU_TOP stats for a minute or so.

Results

Commit	Description	Graphics pipe	Browser CPU	Browser GFX	Browser VRAM	GPU power	Comments
4afc820	Sort fragments while shading	50-60%	15-30%	50%		9 W
4afc variant	SPHERE_MAX_INTERNAL = 12	80-90%	15-20%	80-90%		27 W
4afc variant	SPHERE_MAX_INTERNAL = 4	40-50%	15-20%	35-40%		8-9 W
e80adf8	Correct hit detection	50-60%	15-30%	50%		9 W	Texture pipe and efficiency arbiter are more like 45-60%
6db9f5b	Only draw the top few fragments	55-65%	15-30%	50-60%		9 W
6db9 variant	LAYER_MAX = 8	35-50%	15-25%	38-45%		9 W
a4236a3	Dim sphere interiors	55-65%	15-25%	50-60%	94 MiB	10 W