Item12334: lots of performance improvements



git-svn-id: http://svn.foswiki.org/trunk/DBCachePlugin@16347 0b4bb1d4-4e5a-0410-9cc4-b2b747904278
Item12334: preparing release



git-svn-id: http://svn.foswiki.org/trunk/DBCachePlugin@16348 0b4bb1d4-4e5a-0410-9cc4-b2b747904278