Ssh

Recently I worked on a project where executing remote commands is very slow to start. This is expected because an SSH connection has to be established first.

$ time ssh server exit
ssh server exit  0.04s user 0.01s system 0% cpu 7.901 total

It took nearly 8 seconds to ssh into server.

That’s slow!

After a bit of googling, there is an elegant way to speed this up. Simply put this at the bottom of your ~/.ssh/config.