[Numpy-discussion] String sort

Francesc Altet faltet@carabos....
Wed Feb 13 04:35:33 CST 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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