listdir is slow with large folder

[griffinkelly]

Trying to see if there's a way to speed up the listdir function. If I have a large folder with 100+ files, it takes quite some time for the listdir function to return--I'm using the StorageFS class.

This returns very quickly when I time it, so unsure where the latency is hidden.
directories, files = self.storage.listdir(path).

It must be somewhere in pyftpdlib?

Does anyone have any suggestions on how to speed this up?