[issue14043] Speed-up importlib's _FileFinder

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

> And while I'm thinking about it, the hybrid caching approach of
> caching just the directory contents to start and then caching full
> details on successful searches (and failures) would also let you cache
> the full file path as the strings will be interned and used again by
> the loaders for setting __file__.

Well, you shouldn't call find_module() on the same module twice (except
for benchmarks), so I'm not sure what caching the results would bring.

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<http://bugs.python.org/issue14043>
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