Multirelease effort: Moving to Python 3

[Bohuslav Kabrda]

----- Original Message -----
> On 19/07/13 02:41 -0400, Bohuslav Kabrda wrote:
> > ----- Original Message -----
> >> On Thu, Jul 18, 2013 at 11:24:22AM -0400, Bohuslav Kabrda wrote:
> >>> FAQ:
> >>> Q: Why do we need to switch to Python 3?
> >>> A: Because Python 2 is old, slower, less pythonic, doesn't get any more
> >>> functionality and it won't be that long before the official upstream
> >>> support ends [1]
> >>> 
> >> Although I agree with the need to switch to python3, I don't think the
> >> first
> >> three reasons are very compelling arguments (they're only half-truths) --
> >> we
> >> should concentrate on the last reason and also on features that python3
> >> has that pyhton2 doesn't.  Chained exceptions are a pretty nice thing, for
> >> instance.
> >> 
> > 
> > So first three reason:
> > - Python 2 is old - how is that a half-truth?
> > - Slower - yes, in the beginning, Python 3 was significantly slower
> > because of nonoptimal code after the rewrite from Python 3. But with
> > Python 3.3 for instance, you get tons of speed improvements -
> > decimal module for instance got a significant boost. Brett Cannon
> > had a nice presentation about speed benchmarking [1]. Yes, Python 3
> > is slower in some areas, but mostly it's faster.
> 
> Mind to share some grounds for this claim?  My negligible experience
> told me the contrary, but perhaps timeit module is a bad indicator.
> 

There is the presentation that I referenced in the email that you reacted to (referenced by [1]). You can also have a look at pystone benchmark results (a quick googling around gave me e.g. http://www.levigross.com/post/2340736877/pystone-benchmark-on-2-6-2-7-3-2)

> Otherwise yes, let's get gently beyond 3000.
> 
> --
> Jan
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-- 
Regards,
Bohuslav "Slavek" Kabrda.