[Numpy-discussion] String sort
Francesc Altet
faltet at carabos.com
Wed Feb 13 05:35:33 EST 2008
A Tuesday 12 February 2008, Bruce Southey escrigué:
> Hi,
>
> I have a Opteron 248 (2.66GHz) that with gcc 4.1.0 (SUSE10.1?) that
> gives C qsort with C style compare: 0.650000
> C qsort with Python style compare: 0.640000
> NumPy newqsort: 0.360000
That's very intersting. In a similar configuration, but using SuSe 10.3
(Enterprise) instead of 10.1, I don't see this factor of almost 2 of
difference in performance (in fact, both performances, C qsort and
NumPy newqsort, are very similar).
This seems to confirm that the GNU glibc crew has fixed the qsort
performance very recently (i.e. I hope it is not only a fix in SuSe
10.3 Enterprise), and this is why most of current distros are seeing
the poor performance in qsort.
Cheers,
--
>0,0< Francesc Altet http://www.carabos.com/
V V Cárabos Coop. V. Enjoy Data
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