Hi,
nested prange loops seem to be a common gotcha for users. I can't say if
there is ever a reason to do this, but at least I can't think of any. For
me, this sounds like we should turn it into a compile time error – unless
someone can think of a use case? Even in that case, I'd still emit a
warning since it seems so unlikely to be intended.
Please reply to the cython-users list to facilitate user feedback.
Stefan
-------- Forwarded Message --------
Subject: Re: [cython-users] Converting to Python objects with nogil (inside
prange for loop)
Date: Fri, 15 Jul 2022 07:43:26 +0100
with nogil, parallel():
for i in prange(N):
for j in prange(km.BatchSize):
You usually only want one loop in a set of nested loops to be prange.
Typically the outer loop, but in this case it might be easier to
parallelize the inner loop.
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