object caching wrapper around BerkeleyDB

 Cache::BDB implements a caching layer around BerkeleyDB for object
 persistence. It implements the basic methods necessary to add, retrieve, and
 remove objects but not expiration, automatic purging etc. The main advantage
 over other caching modules is performance. The API is reasonably feature rich,
 but does not compare with using BerkeleyDB directly.
 .
 The interface is similar to Cache::Cache.