I'm not too worried about slowing down __module__ especially since it's
not any slower for heap types or types in builtins.

On Thu, Sep 8, 2016, at 14:39, Serhiy Storchaka wrote:
> 
> Serhiy Storchaka added the comment:
> 
> This is what my first path does. But this slows down retrieving the
> __module__ attribute (from 0.2 usec to 0.4 usec on my computer). Maybe I
> haven't bother.
> 
> Interning __name__ and __qualname__ is less important, because different
> functions and classes usually have different names.
> 
> ----------
> 
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> <http://bugs.python.org/issue25856>
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