Semi-related – I’ve got a page with a repeatable field that the client has created ~150 repeated fields with.
On some browsers this causes the page to become unresponsive. I say semi-related because it looks to be due to the get_visibility() js method for fields with conditional logic.
Attached is the js profile. If I remove all field conditional rules, or force get_visibility() to return true, then the page does not become unresponsive.