speed up nodered ssh vs host

gistfile1.txt

cd /root/DockerIOT/nodered

shutdown nodered:
dstop

paste this in a new file named "config" in the nodered/ssh folder (for example: mcedit /root/DockerIOT/nodered/ssh/config), change the device ip with yours:

########################################
Host host
    Hostname DEVICEIP
    Port 22
    IdentityFile ~/.ssh/id_nr
    User root
    StrictHostKeyChecking accept-new
    PreferredAuthentications publickey
    Compression yes
    ControlMaster auto
    ControlPath ~/.ssh/control:%h:%p:%r
    ControlPersist 10m
########################################

fix permissions and restart nodered:
cd /root/DockerIOT/nodered
chown -R 1000:1000 data ssh ../dbs
dstart

now modify the exec nodes, the "command" text box should contain just "ssh host", nothing else, exactly this, that's it...
1st ssh will be a bit slow as always, next ones much faster