The docs (see also this) for autocast in PyTorch only discuss training. Does it speed things up if I also use autocast for inference?
Can I speed up inference in PyTorch using autocast (automatic mixed precision)?
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Yes it could (may not in some cases though).
You are processing data with lower precision (e.g.
float16vsfloat32). Your program has to read and process less data in this case.This might help with cache locality and hardware specific software (e.g. tensor cores if using CUDA)