On 23/07/13 03:16 -0400, Bohuslav Kabrda wrote: > ----- 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]). Saw the presentation before actually replying -- it doesn't show any evidence Python 3.3 would be noticably faster. And my micro tests unfortunately fell into the "slower" category as nicely demonstrated in the graphs there. > 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) This is more than two years old. The score reliability of this benchmark is also questionable (not speaking about order of magnitude difference as with PyPy). >> Otherwise yes, let's get gently beyond 3000. -- Jan -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel
