[Python-Dev] PEP 414 - Unicode Literals for Python 3 (original) (raw)

Antoine Pitrou solipsis at pitrou.net
Tue Feb 28 12:20:19 CET 2012

On Tue, 28 Feb 2012 10:02:46 +0100 "Martin v. Löwis" <martin at v.loewis.de> wrote:

On the contrary, I'd expect that the build time using 2to3 is significantly shorter than the test suite run times, in particular for large projects. For example, for Django, 2to3 takes less than 3 minutes (IIRC), and the test suite runs an hour or so (depending on how many tests get skipped).

In the end, that's not particularly relevant, because you don't have to run the test suite entirely; when working on small changes, you usually re-run the impacted parts of the test suite until everything goes fine; on the other hand, 2to3 has to run on the entire code base.

So, really, it's a couple of seconds to run a single bunch of tests vs. several minutes to run 2to3 on the code base. And it's not just the test suite: every concrete experiment with the library you're porting has a serial dependency on running 2to3.

Regards

Antoine.

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