Least recently written eviction policy for Cachex.

This module provides an eviction policy for Cachex, evicting the least-recently written entries from the cache. This is determined by the touched time inside each cache record, which means that this eviction is almost zero cost, consuming no additional memory beyond that of the running GenServer.

This policy accepts a reclaim space to determine how much of the cache to evict, allowing the user to determine exactly how much they’d like to trim in the event they’ve gone over the limit.

The :batch_size option can be set in the limit options to dictate how many entries should be removed at once by this policy. This will default to a batch size of 100 entries at a time.

This eviction is relatively fast, and should keep the cache below bounds at most times. Note that many writes in a very short amount of time can flood the cache, but it should recover given a few seconds.