anyway i have in my game small ships with rts movement, they are 32x32 pixels and use 30x30 grid.
About 20-30 of them can fly around without almost any decrease in fps whatsoever. I also tested 50 of them which is a lot more than you will actually ever encounter, and fps hardly even changed.
But as i have made bigger ships that also use rts movement, they are 230x150 with 200x200 grid(i tried 300x300 aswell). Fps falls down to 20-30 from the max 60 and thats with only 4 of them moving.
I did however noticed that if they do not avoid themselves the fps is at maximum.
Probably i am doing something wrong or bigger objects dont work well with rts pathfinding.
Now the question is since avoid moving over something ussually means move right into it. Would there be a better way to set up the rts movement when it comes to bigger objects.