[Numpy-discussion] Calling scipy blas f rom cython is extr emely slow

Jerome Kieffer Jerome.Kieffer@esrf...
Sat Feb 23 14:29:01 CST 2013


On Sat, 23 Feb 2013 18:31:42 +0000 (UTC)
Sergio Callegari <sergio.callegari@gmail.com> wrote:

> However, it is still slower than the cblas
> 
> cblas -> 0.69 sec
> scipy blas -> 0.74 sec

if you are using scipy blas, the real question is which blas is underneath ?
OpenBlas, GotoBlas, Atlas, MKL ?

Under Debian I observed a x17 in speed from 35s to 2s with an "apt-get install atlas" on Armando's code.

Cheers,

-- 
Jérôme Kieffer
Data analysis unit - ESRF


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