Fairly new on HE, just a couple weeks. Got pretty disappointed about Dashboards slow loading. They were so slow I quit even trying.
Then I saw an obscure comment in another thread that mentioned only authorizing the devices you need on a dashboard. Checked the documentation and it said that would help also. Little hard to find.
Anyway, I did that and wallah. Dashboards went from 30 secs to never loading to just a couple seconds.
Maybe that should be mentioned in the dashboard configuration screen.....