A simple ruby LRU cache developed using hash and doubly linked list
Rehearsal --------------------------------------------
LRUCache 0.214681 0.000896 0.215577 ( 0.215752)
----------------------------------- total: 0.215577sec
user system total real
LRUCache 0.194462 0.000137 0.194599 ( 0.194754)
make test
make benchmark