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Author yselivanov
Recipients Arfrever, asvetlov, gvanrossum, larry, martin.panter, ncoghlan, python-dev, scoder, vstinner, yselivanov
Date 2015-07-03.03:56:33
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> Oh, wait, I was confusing myself.  This is that new module you guys created for type hints, and this is a new object with no installed base.  (Right?)

No, you were right in your previous comment...

> Help me to understand here.  You want to check in a patch adding 300 new lines of C code to the types module during beta, for a speed optimization, after we've already hit beta?

> While I like speedups as much as the next guy, I would be happier if this waited for 3.6.

This speedup will mostly affect code compiled with Cython. See the following example:
  def coro():
     yield from ...

Cython will compile "coro" into a function, that returns a generator-like object.  "asyncio.coroutine" will wrap this function, and, therefore, the optimized by Cython generator-like object will be wrapped too (to provide an __await__ method).

This patch provides a faster wrapper for such generator-like objects. Since the whole point of using Cython is to squeeze as much performance as possible, I think it's essential to have this optimization in 3.5 (or at least in 3.5.1 as Guido suggested).

It's a lot of C code, I agree. I only can say that I did my best to write very extensive unittests, and so I hope that it won't cause any trouble.
Date User Action Args
2015-07-03 03:56:34yselivanovsetrecipients: + yselivanov, gvanrossum, ncoghlan, scoder, vstinner, larry, Arfrever, asvetlov, python-dev, martin.panter
2015-07-03 03:56:34yselivanovsetmessageid: <>
2015-07-03 03:56:34yselivanovlinkissue24325 messages
2015-07-03 03:56:33yselivanovcreate