JCIFS: file retrieval is too slow to be usable

Question

I was just testing JCIFS for accessing Windows shares. It is very slow to the point of being completely unusable.

import jcifs.smb.*;

class First {
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Answer 1

I know this is an old question, but for anyone else who has tried the other solutions to no avail:

In my case, I was able to track the slowdown to jcifs' heavy use of SecureRandom, which blocks if /dev/random reports insufficient entropy.

Installing rng-tools and configuring and enabling rngd brought performance up to acceptable levels.

You can check the available entropy (on RHEL at least) with the following command:

cat /proc/sys/kernel/random/entropy_avail