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Showing content from https://mail.python.org/pipermail/python-dev/2011-December/114989.html below:

[Python-Dev] readd u'' literal support in 3.3?

[Python-Dev] readd u'' literal support in 3.3? [Python-Dev] readd u'' literal support in 3.3?Lennart Regebro regebro at gmail.com
Wed Dec 14 22:57:37 CET 2011
On Wed, Dec 14, 2011 at 17:33, Tres Seaver <tseaver at palladion.com> wrote:
> Not in the experience of the folks who are actually doing that task:  the
> overhead of running 2to3 every time 'setup.py develop' etc. runs dooms
> the effort.  For instance, we have a report that the 2to3 step takes more
> than half an hour (on at least one user's development machine) when
> installing / refreshing zope.interface in a Python 3.2 virtualenv.

If that is true, then there has to be a bug somewhere...
I might not have tried on 3.2 with virtualenv, but it doesn't take
anywhere near that time normally, and this is not a normal runtime at
all. When we are talking about 2to3 being slow here we are talking
about it taking 10 seconds to install a software that would have taken
under a second to install on Python 2. (Yes, I'm thinking of
Distribute, I just checked. ;-) ).

//Lennart
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