I just did some testing and recognized some important aspects:
* The game speed does not slow down but the framerate decreases
* Its only noticable if you accelerate the gamespeed (try 3x or 4x)
* One core of my CPU is at 100% when the situation ocurs (game speed: 3x)
* The slowdown starts when the opponents returned from the battlefield to their buildings (shot005). As long as they are on the battlefield, their is no slowdown (shot004)
I just did some testing and recognized some important aspects:
* The game speed does not slow down but the framerate decreases
* Its only noticable if you accelerate the gamespeed (try 3x or 4x)
* One core of my CPU is at 100% when the situation ocurs (game speed: 3x)
* The slowdown starts when the opponents returned from the battlefield to their buildings (shot005). As long as they are on the battlefield, their is no slowdown (shot004)