re.search much slower then grep on some regular expressions

[Kris Kennaway]

Jeroen Ruigrok van der Werven wrote:
> -On [20080709 14:08], Kris Kennaway (kris at FreeBSD.org) wrote:
>> It's compiler/build output.
> 
> Sounds like the FreeBSD ports build cluster. :)

Yes indeed!

> Kris, have you tried a PGO build of Python with your specific usage? I
> cannot guarantee it will significantly speed things up though.

I am pretty sure the problem is algorithmic, not bad byte code :)  If it 
was a matter of a few % then that is in the scope of compiler tweaks, 
but we're talking orders of magnitude.

Kris

> Also, a while ago I did tests with various GCC compilers and their effect on
> Python running time as well as Intel's cc. Intel won on (nearly) all
> accounts, meaning it was faster overall.
> 
> From the top of my mind: GCC 4.1.x was faster than GCC 4.2.x.
>