Package ttlru provides a simple, goroutine safe, cache with a fixed number of entries. Each entry has a per-cache defined TTL. This TTL is reset on both modification and access of the value. As a result, if the cache is full, and no items have expired, when adding a new item, the item with the soonest expiration will be evicted.
It is based on the LRU implementation in golang-lru: github.com/hashicorp/golang-lru
Which in turn is based on the LRU implementation in groupcache: github.com/golang/groupcache/lru
It should be imported as