[Numpy-discussion] Optimizing mean(axis=0) on a 3D array
Martin Spacek
numpy at mspacek.mm.st
Mon Aug 28 02:01:57 CDT 2006
Tim Hochberg wrote:
> I'm actually surprised that the take version is faster than my original
> version since it makes a big ol' copy. I guess this is an indication
> that indexing is more expensive than I realize. That's why nothing beats
> measuring!
Actually, your original version is just as fast as the take() version.
Both are about 9X faster than numpy.mean() on my system. I prefer the
take() version because you only have to pass a single argument to
mean_accum()
Martin
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