update: i was playing again with barely any notes and my memory usage was somehow still too high, i don't know why it's so high by default, or maybe it's the world i'm using?
update 2: i'm starting to understand the dictionary a bit better, any time my memory usage is high i name a random item involved with what's happening and it helps, soon i will put every single thing in the dictionary and will have no memory usage! >:D