Talk:Game Updates/@comment-7932276-20131008013259/@comment-4756055-20131008051932

There's also the issue of main memory. If BFS keeps expanding the current area, the file keeps growing bigger and bigger. Devices with smaller amounts of memory will start having problems. When a game uses a new realm, that code "overlays" the original portion, occupying the same area in memory. This lets you have a larger game without using lots and lots of additional memory. The drawback to this, of course, is the amount of time it takes to load a location when you travel from one to the other.