I don't know if I'm the only one with this, but the longer I play the game, over time, small freezes start to appear for a couple of seconds. Everything is fine at first, but after two hours of the game, the freezes start for two or three seconds.
This is highly likely the game autosaving. I get this happening to me as well, but quickly realized it was the game saving. Next time it happens double-check your autosave file to see if it's updated, and you'll know it's just that. Otherwise, it's probably something else.
