This module is similar to ets in that it provides a storage for Erlang terms that can be accessed in constant time, but with the difference that persistent_term has been highly optimized for reading terms at the expense of writing and updating terms.

When a persistent term is updated or deleted, a global garbage collection pass is run to scan all processes for the deleted term, and to copy it into each process that still uses it.

Therefore, persistent_term is suitable for storing Erlang terms that are frequently accessed but never or infrequently updated.