[Python-Dev] Re: Who cares about the performance of these opcodes?

[Michael Hudson]

"A.M. Kuchling" <amk at amk.ca> writes:

> On Tue, 09 Mar 2004 08:59:52 -0500, Phillip J. Eby
> <pje at telecommunity.com> wrote:
>> I personally don't think it'll help much, if the goal is to reduce
>> cache misses.  After all, the code is all still there.  But, it
>> should not do
>
> For a planned PyCon lightning talk, I'm benchmarking various
> combinations of optimizer options.
> One interesting result: CVS Python gets 25997 pystones on my machine
> when compiled with
> -O3 (the default), but 26707 when compiled with gcc's -Os flag.  -Os
>  optimizes for size,
> running the subset of the -O2 optimizations that don't increase code size.

What architecture?  I played around on my ibook with various
compilation options and running with -fprofile-arcs and so on and
basically came to the conclusion that nothing made very much
difference (once past -O2).  Can't remember if I tried -Os.

Cheers,
mwh

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