I'm with a doubt, I have played in my single world, built my modpack, some mods that I really like, I will list them here: But after a while usually playing the game begins in a very slow, which I can not play, he does not suffer crash but I need to close it. In launcher report the message: java.lang.OutOfMemoryError: permgen space As you can see my MODs list is a little long, I would like to ask how can I esolver this problem, and what is the cause, thanks.