[issue22524] PEP 471 implementation: os.scandir() directory scanning function

[Akira Li]

Akira Li added the comment:

As I've mentioned in http://bugs.python.org/issue22524#msg231703

  os.walk size 7925376343, scandir.walk size 5534939617 -- NOT EQUAL!

os.walk and scandir.walk do a different work here.

I don't see that it is acknowledged so I assume the benchmark is not fixed.

If the fixed (same work) benchmark is used then there is no performance difference on Linux. See the attached file http://bugs.python.org/file37292/get_tree_size_listdir.diff 

Note: the performance improvements on Windows along should be enough to accept os.scandir() even if Linux version won't be improved (if the behavior is documented).

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