[Python-Dev] Issue 11406: adding os.scandir(), a directory iterator returning stat-like info (original) (raw)

Antoine Pitrou solipsis at pitrou.net
Tue May 14 12:34:25 CEST 2013

Le Tue, 14 May 2013 22:14:42 +1200, Ben Hoyt <benhoyt at gmail.com> a écrit :

>> It should be no slower when it's all moved to C. > > The slowdown is too small to be interesting. The main point is that > there was no speedup, though.

True, and thanks for testing. I don't think that's a big issue, however. If it's 3-8x faster in the majority of cases (local disk on all systems, Windows networking), and no slower in a minority (sshfs), I'm not too sad about that. I wonder how sshfs compared to nfs.

Ok, with a NFS mount (default options, especially "sync") to the same local VM:

First run: os.walk took 17.137s, scandir.walk took 0.625s -- 27.4x as fast

Second run: os.walk took 1.535s, scandir.walk took 0.617s -- 2.5x as fast

(something fishy with caches?)

Regards

Antoine.

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