Computation times

00:32.304 total execution time for 5 files from auto_examples/basics:

Example	Time	Mem (MB)
Use iterative reconstruction algorithms (demo_custom_optim.py)	00:21.069	0.0
5 minute quickstart tutorial (demo_quickstart.py)	00:07.778	0.0
Bring your own dataset (demo_custom_dataset.py)	00:02.174	0.0
Use a pretrained model (demo_pretrained_model.py)	00:01.123	0.0
Bring your own physics (demo_custom_physics.py)	00:00.160	0.0