[issue24325] Speedup types.coroutine()

[Stefan Behnel]

Stefan Behnel added the comment:

> the undecorated form will never be visible to any code other than the decorator

Assuming that 1) it's the first and/or only decorator, 2) it's used to
decorate a generator function that returns its own generator and 3) it's
really used as a decorator and not as a general helper function to safely
wrap some object that was created somewhere else.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue24325>
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