If you use Remmina, you might encounter some slowness using SSH.
This is caused by a bug in libssh versions 0.4.5 & 0.4.6.
To solve this problem, you need to install on your system libssh version 0.4.5-2.
At the moment I’m writing this down, the package in the official repositories is libssh_0.4.5-1 which also causes the bug with Remmina.
So, you can download libssh_0.4.5-2
Then, install it with this command:
sudo dpkg -i libssh-4_0.4.5-2.deb
That’s it, SSH will now work smoothly with Remmina.