SMB protocol way slower since > 8.7.2

[jk779]

Describe the bug
The last version I've had a good smb connection speed with was 8.7.2. I believe I've tried to update to 8.8 which killed the performance. Before: 50 MB/s (limited by the hardware at the smb sever), everything after 8.7.2. => ~5-8 MB/s.

I've seen that you've changed the encryption to be on by default between the versions, which i thought was the problem, so i rolled back and it was fast again.

Today I'v seen a major version update and noticed in the changelog that you've reverted the changes to the SMB connection, so I tried updating again. But sadly, the speed is still droppping to around 5 MB/s.

Any idea whats going on? I've checked again with the old version (8.7.2), and with this, the speed is at the old level ~50 MBs again.

The smb server is a fairly vanilla samba on ubuntu 22.04.

Best, Michael

[dkocher]

Relates to #15817

[dkocher]

Probably blocked by upstream issue ¹.

Footnotes

1. SMBJ Performance hierynomus/smbj#817 ↩

[dkocher]

Depends on ¹.

Footnotes

1. Performance improvement for unsigned packets (#817 fix) hierynomus/smbj#824. ↩

[jk779]

i can report that smb transfers are still slow as f in 9.0.2 (and need a good amount of CPU resources).

Maybe its the wrong place/time/setting, but what was the issue with "the old" implementation for smb (pre smbj)? (implying to roll it back ;) as @dkocher is astonished on the PR on their side too. maybe its not a very activly maintained project and thus not a good choice from the beginning?)

I guess there are many people expieriencing this bug, but just don't recognize it could be an issue in a software ("huh, my wifi is probabaly bad today 🤷‍♂️")

Best,
Michael