Table 1. Performance data of all test cases shown in Sec. 3., using the compute platforms described in Sec. 3.1. Walltimes shown in seconds do not include the time spent for saving intermediate results, or for providing diagnostic checkpoint results after each epoch.

Case	Backend	Platform	Tile size	Number of tiles per batch	Mean walltime per batch (s)	Data size (GB)
MDH (simulation)	PyTorch	Godzilla	$512\times 512$	4 (1 set of 4 distances)	0.08	0.004
MDH (experimental)	PyTorch	Godzilla	$2160\times 2560$	3 (1 set of 3 distances)	1.4	166 (all angles)
2D ptychography w/ pos. refin.	PyTorch	Godzilla	$256\times 256$ (5 modes)	35	0.4	2.6
Sparse MS ptychography	PyTorch	Godzilla	$128\times 128$	101	0.3	0.19
Ptychotomography	PyTorch	Godzilla	$64\times 64$ (5 modes)	50	5.2/2.2 (w/wo. tilt refin.)	29.5
Tomography with DO	Autograd	Theta	$25\times 52$	1	5.8	4.8