[Numpy-discussion] String sort

Francesc Altet faltet@carabos....
Thu Feb 14 11:54:56 CST 2008


A Thursday 14 February 2008, Bruce Southey escrigué:
> Hi,
> I confirmed the gcc 4.2.3 performance for the Opteron:
>
> Benchmark with 1000000 strings of size 15
> C qsort with C style compare: 0.630000
> C qsort with Python style compare: 0.630000
> NumPy newqsort: 0.360000
>
> I also installed the Intel icc 10.1 compiler on my Opteron system but
> I did not use any flags:
> $ /opt/intel/cc/10.1.008/bin/icc sort-string-bench.c -o icc_sort
> $ ./icc_sort
> Benchmark with 1000000 strings of size 15
> C qsort with C style compare: 1.030000
> C qsort with Python style compare: 0.960000
> NumPy newqsort: 0.530000

That's excellent Bruce.  Definitely it looks like the problem with the 
optimizer in 4.2.1 has been fixed in 4.2.3.

And why you haven't used optimization flags with ICC? just curious...

Cheers,

-- 
>0,0<   Francesc Altet     http://www.carabos.com/
V   V   Cárabos Coop. V.   Enjoy Data
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