Using AWS P3 instances

Hey @jeremy, I’ve done some rudimentary benchmarking. It certainly is way faster. [Adv] Significant changes to fastai just pushed

However, the learner object creation is taking more than 8 minutes. And then, it’s fast. Are you facing something similar on p3?

Currently I’m using the conda version of PyTorch. I could try benchmarking again by installing it from source.