When I tell the engine to find the best move with
go movetime 1 depth 1
I expect it allows itself to take up to about 1 ms to make it's move. But what's the difference between that and the Slow Mover option:
option name Slow Mover type spin default 84 min 10 max 1000
Looking at this post from 2008 it seems like perhaps Slow Mover was implemented before the movetime option?