[Python-Dev] Python 3.3 vs. Python 2.7 benchmark results (again, but this time more solid numbers)

[Antoine Pitrou]

On Sat, 27 Oct 2012 20:38:58 -0700
"Gregory P. Smith" <greg at krypto.org> wrote:
> One word: profile.
> 
> Looking at stat counts alone rather than measuring the total time spent in
> all types of system calls from strace and profiling is not really useful. ;)

Agreed, but I can't seem to cope properly with gprof. Any suggestion?

> Another thing to keep an eye out for within a startup profile:  how often
> does the gc collect?  our default gc collection thresholds haven't been
> tuned in ages afaik [or am i forgetting something] and I know of
> pathological cases at work where simply doing a gc.disable() before
> importing a bunch of modules (tons of generated protocol buffer code) and
> re-enabling it afterwards speeds up this application's startup way more
> significantly than seems healthy in 2.x... that could be related to the
> particulars of the protobuf module code though.

That's a good suggestion indeed.

Thanks

Antoine.