When an unit is dead,why the game doesn't free the memory it occupy?I played a game ,at first,memory was low ,when all players produced many units,memory was high.but when i killed all units include my units,the memory was still high.I wonder why the game doesn't free the unit memory when this unit dies and we don't need it any more ,we should only record player's kills ã€deaths and so on ,the memory should change as alive unit numbers ,not units we all produce since game begins.