code/controllers/subsystem/area_contents.dm

/var/SSarea_contents	Responsible for managing the sizes of area.contained_turfs and area.turfs_to_uncontain These lists do not check for duplicates, which is fine, but it also means they can balloon in size over time as a consequence of repeated changes in area in a space They additionally may not always resolve often enough to avoid memory leaks This is annoying, so lets keep an eye on them and cut them down to size if needed

/var/SSarea_contents

Responsible for managing the sizes of area.contained_turfs and area.turfs_to_uncontain These lists do not check for duplicates, which is fine, but it also means they can balloon in size over time as a consequence of repeated changes in area in a space They additionally may not always resolve often enough to avoid memory leaks This is annoying, so lets keep an eye on them and cut them down to size if needed