Blog "about python 3"

[Terry Reedy]

On 1/2/2014 11:49 PM, Steven D'Aprano wrote:
> Robin Becker wrote:
>
>> For fairly sensible reasons we changed the internal default to use unicode
>> rather than bytes. After doing all that and making the tests compatible
>> etc etc I have a version which runs in both and passes all its tests.
>> However, for whatever reason the python 3.3 version runs slower
>
> "For whatever reason" is right, unfortunately there's no real way to tell
> from the limited information you give what that might be.
>
> Are you comparing a 2.7 "wide" or "narrow" build? Do your tests use any
> so-called "astral characters" (characters in the Supplementary Multilingual
> Planes, i.e. characters with ord() > 0xFFFF)?
>
> If I remember correctly, some early alpha(?) versions of Python 3.3
> consistently ran Unicode operations a small but measurable amount slower
> than 3.2 or 2.7. That especially effected Windows. But I understand that
> this was sped up in the release version of 3.3.

There was more speedup in 3.3.2 and possibly even more in 3.3.3, so OP 
should run the latter.

-- 
Terry Jan Reedy