What would be the optimal terrain tile size for performance?

As topic

 

I imagine the answer would vary greatly between say an iPhone 4S and a $4000 desktop gaming computer.

 

I'm using 1024sqr tiles with a system that loads and unloads tiles as necessary, as well as moving everything when the player enters a new tile in order to get around the float limitations.

The lack of multitile support on terrain tools is a pain though, as is the bad stitching between tiles when stamping in the editor (unity 2018.3.3).

 

I see, so it's not really a useful creature to have unless origin shifting or having a really big world>10k units.