[Numpy-discussion] Rewrite np.histogram in c?

Jerome Kieffer Jerome.Kieffer at esrf.fr
Mon Mar 16 12:28:48 EDT 2015


On Mon, 16 Mar 2015 06:56:58 -0700
Jaime Fernández del Río <jaime.frio at gmail.com> wrote:

> Dispatching to a different method seems like a no brainer indeed. The
> question is whether we really need to do this in C.

I need to do both unweighted & weighted histograms and we got a factor 5 using (simple) cython:
it is in the proceedings of Euroscipy, last year.
http://arxiv.org/pdf/1412.6367.pdf

We got much faster but that's another story.

In fact, many people coming from IDL or Matlab are surprised by the
poor performances of numpy's histogram.

Cheers

-- 
Jérôme Kieffer
tel +33 476 882 445



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