User blog comment:Hyliancreed55/Assassin's Creed: Brotherhood/@comment-7749170-20130906084202/@comment-4829046-20130906150547

Well through my first play-through it was on a PC with low specs so that was a severe handicap. The PC I'm using currently was way better and I managed to have smoother gameplay and no lag. That was how I was able to finish it. I just used speed tactics. However I do know of a glitch.

In fact its better if you read it here since I never used that glitch.