[Python-Dev] Python startup time

[Antoine Pitrou]

Le Wed, 9 Oct 2013 08:39:40 -0400,
Benjamin Peterson <benjamin at python.org> a écrit :
> 2013/10/9 Antoine Pitrou <solipsis at pitrou.net>:
> > Le Wed, 9 Oct 2013 10:29:30 +0200,
> > Antoine Pitrou <solipsis at pitrou.net> a écrit :
> >> Le Tue, 8 Oct 2013 15:43:40 -0400,
> >> Benjamin Peterson <benjamin at python.org> a écrit :
> >>
> >> > 2013/10/8 R. David Murray <rdmurray at bitdance.com>:
> >> > > In this context, if we'd been *really* smart-lazy in CPython
> >> > > development, we'd have kept the memory and startup-time
> >> > > and...well, we probably do pretty well on CPU
> >> > > actually...smaller, so that when smartphones came along Python
> >> > > would have been the first high level language used on them,
> >> > > because it fit.  Then we'd all be able to be *much* lazier
> >> > > now :)
> >> >
> >> > Even on desktop, startup time leaves a lot to be desired.
> >>
> >> That's true. Anyone have any ideas to improve it?
> >
> > It's difficult to identify significant contributors but some
> > possible factors:
> > - marshal.loads() has become twice slower in 3.x (compared to 2.7)
> > - instantiating a class is slow (type('foo', (), {}) takes around
> > 25ms here)
> 
> There's also the increasing number of modules (Python or otherwise)
> that have to be loaded on startup.

See e.g. http://bugs.python.org/issue9548

Regards

Antoine.