I've pushed a beta version of Dashboard to npm (not to flows catalogue). I have spent a wet Saturday looking at chart updates and trying to speed up reloads and data shifting. I suspect the main issue is actually buried deep in angular and chart.js somewhere - but I have found some hopefully useful gains... Hopefully none of the changes break anything but ... hence this request.
I would be grateful if a few of you could give it a whirl. In particular those of you with multiple charts.
This can be installed manually by going into your user directory and installing - eg
cd ~/.node-red npm i email@example.com
Don't forget to flush local browser cache to ensure getting latest client side code etc... Feedback here please.