Inference on TPUs instead of GPUs.

Hi folks! Our AI Hypercomputer team ported Flux inference implementation to MaxDiffusion and were able to successfully run both Flux-dev and Flux-schnell models using Google's TPUs.

Running tests on 1024 x 1024 images with flash attention and bfloat16 gave the following results:

Model	Accelerator	Sharding Strategy	Batch Size	Steps	time (secs)
Flux-dev	v4-8	DDP	4	28	23
Flux-schnell	v4-8	DDP	4	4	2.2
Flux-dev	v6e-4	DDP	4	28	5.5
Flux-schnell	v6e-4	DDP	4	4	0.8
Flux-schnell	v6e-4	FSDP	4	4	1.2

We'd appreciate if you could give us some feedback on the above-mentioned results and our overall approach.