There is none I know of. Any mission (depending on your system, more or less) will lag if you place lots of units (not sure on logics, though). Try to avoid this. About the gamelogics, I never used so many of them that I really noticed a lag difference. So I see it both ways, since a gamelogic is invisible, it will not cause lag. Since it is a unit, it will cause lag.
Just to be safe, keep it to a minimum; by the way what do you need all the gamelogics in the world for???