A pool of LRU caches.
var LRU = require('lru-cache'),
LRUPool = require('lru-cache-pool'),
pool = LRUPool(LRU),
c1, c2;
c1 = pool.get('users');
c1.put('z', 77);
c2 = pool.get('users');
assert.equal(77, c2.get('z'));Options can be provided in the constructor LRUPool(LRU, options),
as well as when creating new caches via get pool.get('name', options).
Refer to the lru-cache Options section of the readme for details.
When calling pool.get() for the first time a new cache will be created
and placed in a pool. Subsequent calls will get an existing cache from the
pool, unless it is expired; in which case a new cache will be created.