The persistance never created a lag problem before. I always do it. I did it because I have certain objects and chests/pedestals that need to keep their form (taken or not, which item it possesses) without creating global variables. Like I said... the persistance never created a lag problem before, and I use it in almost all of my games. I have 15 rooms, and after being in each one, the fps remains the same (hovering between 26 to 30 fps).