There appears to be quite a huge memory leak. When one of the helicopters fires it's missiles at an air unit and the air unit dies before the missile lands, the missile will continue to fly off the map for the rest of the game. Once a significant amount of these builds up the frame rate starts tanking. Missiles should keep track of their original target (What they were intended to fire against) and if that target dies while it is alive it should just be removed.
A member registered Aug 19, 2016