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Fri Feb 13 13:25:38 CET 2015 · https://mail.python.org/pipermail/python-dev/2015-February/138219.html

On Fri, 13 Feb 2015 11:07:03 +0100
Victor Stinner <victor.stinner at gmail.com> wrote:
> 
> * C implementation: scandir is at least 3.5x faster than listdir, up
> to 44.6x faster on Windows
> * C+Python implementation: scandir is not really faster than listdir,
> between 1.3x and 1.4x faster

So amusingly, the bottleneck is not so much the cost of system calls,
but the cost of Python wrappers around system calls.

Regards

Antoine.

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Showing content from https://mail.python.org/pipermail/python-dev/2015-February/138219.html below:

[Python-Dev] PEP 471 (scandir): Poll to choose the implementation (full C or C+Python)