Le Tue, 14 May 2013 21:10:08 +1200, Ben Hoyt <benhoyt@gmail.com> a écrit :
On a locally running VM: os.walk took 0.400s, scandir.walk took 0.120s -- 3.3x as fast
Same VM accessed from the host through a local sshfs: os.walk took 2.261s, scandir.walk took 2.055s -- 1.1x as fast
Same, but with "sshfs -o cache=no": os.walk took 24.060s, scandir.walk took 25.906s -- 0.9x as fast
Thanks. I take it those are "USING FAST C version"?
Yes.
What is "-o cache=no"? I'm guessing the last one isn't giving dirents, so my version is slightly slower than the built-in listdir/stat version due to building and calling methods on the DirEntry objects in Python.
It disables sshfs's built-in cache (I suppose it's a filesystem metadata cache). The man page doesn't tell much more about it.
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. Regards Antoine.