Thanks Sergio,
Although I’m an Insights neophyte, it appears the lion’s share of the added time is ‘Slate: Tick (Time and Widgets)’ Avg 8ms pre-opening BP, avg 30ms post. I’m not sure what to do with this information though, any tips greatly appreciated.
I can’t be 100% certain, but I believe it only reached this level after updating to 5.5.3.
