Nodered Dashboard Help

I have been looking into using the Node Red dashboard that is part of the EmonPi install that I have, rather then Freeboard.

All looks good, and I have a dashboard set up that I can access from my PC, but when I try and open it on my Raspberry Pi browser (that I use to power a display in my house), it either doesn’t display, or takes forever to display the dashboard (Several Minutes) and is very slow to update.

I will admit that I am using a model B Pi, and a Pi Zero to run this on, but I was hoping that it would run the dashboard OK as it runs Freeboard well.

Does anyone have any thoughts / ideas about how I could speed it up or make it work?

Thanks in advance.