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[functorch] Prevent using for-loop for out-of-place index_fill batch rule #99229
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Can we write this for-loop such that we won't have to check
value_bdim
every iteration?There was a problem hiding this comment.
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I feel this is the most concise version, and checking
value_bdim
would not be costly.Here are the ways I came up:
value
has a batch dim and do select in every iteration - costly.inplace
andvalue_bdim.has_value()
- not concise.value_bdim.has_value()
before for-loop and use lambdas to wrap eithervalue_
orvalue_.select(0, i)
- I feel unnecessary tbh. Would it be better?Or maybe I'm missing something.
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Hmm, makes sense, plus I would assume that most of the time would be spent in
index_fill
so this should be good.