[issue18810] Stop doing stat calls in importlib.machinery.FileFinder to see if something is a file or folder

[Brett Cannon]

Brett Cannon added the comment:

The directory savings has actually been handled w/o semantics changes; in the last commit for this issue.

The possibility of leaning on file extensions has been asked on python-dev. Once that is resolved then this issue will either get another commit or simply be closed.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18810>
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