On Feb 12, 2008 11:53 AM, Bruce Southey <bsouthey@gmail.com> wrote:

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

I did notice that -O3 was essential to get the performance gain as -O2 gave:
C qsort with C style compare: 0.690000
C qsort with Python style compare: 0.700000
NumPy newqsort: 0.610000

Try -O2 -finline-functions, it should come in somewhere between -O2 and -O3

Chuck