[Numpy-discussion] Sum, multiply are slow ?

David Cournapeau david at ar.media.kyoto-u.ac.jp
Thu Jul 12 04:51:28 EDT 2007

Keith Goodman wrote:
> On 7/12/07, David Cournapeau <david at ar.media.kyoto-u.ac.jp> wrote:
>> While profiling some code, I noticed that sum in numpy is kind of
>> slow once you use axis argument:
> Here is a related thread:
> http://projects.scipy.org/pipermail/numpy-discussion/2007-February/025903.html
Thanks, I remembered there was something about that a few months ago, 
could not find it. By quickly looking at the code for PyArray_Sum, this 
looks like it has nothing to do with caching or looping, but the way 
that summing is implemented (generic reduce).


More information about the NumPy-Discussion mailing list