I have a raspberry Pi 4 with 8GH and opening the History page is super slow.
just clicking on “entity” and the page sometime get stuck for some longs minutes.
I wish by default the page would not load any entity, you could then select manually some entity or then have a button to open all.
Rather than going directly to the History page, click on an entity you are interested in on one of your dashboards. In the more-info pop-up history there is a “More” link that will take you to the history page with that entity selected already.