The Containers panel sets preferences for using the Container feature; in particular, you can use the Status and Update settings to improve performance.

Status setting.
Status setting.
Status setting is on.
These settings determine whether 3ds Max performs an update automatically when you load or reload a container.
This can be useful when you’ve inherited a container that uses the Only Add New Objects or Anything Unlocked rule and saved a local definition; the inherited content can still be updated from the source container.