Depends on your CPU power and Ram you always could turn on ''cpu saver mode'' and ''disable client rendering'' or something like that and then it might go better.
Just go to the left corner and search for the programm ''remote desktop'' or something like that. Just put the IP in the programm and log in to your server that's it.
Some of my VPS are really slow once I start up the bot. I am using Ubuntu 16.04 with XRDP as remote, 1GB ram and a 1 core processor. In the beginning the servers worked great but since a few days they are really slow, CPU is 99% and Ram memory around 95% with just the client open (No script running). If I restart the servers they will work great for a few days but then suddenly become slow again. Does someone know a fix for this? Because it is really annoying.