do pear packages create their own seperate DB connections?

Hi, A lot of packages use DB (and in the future hopefully MDB) and they all need a DSN as a constructor parameter. IMO it would be nice if packages like Auth and Tree etc etc would also accept a reference to an existing connection. Just to give you an example of how things can look right now (syntax may not be completely correct) $conn = MDB::connect($dsn); $auth = new Auth('imap',array("dsn"=>$dsn)); $tree = Tree::create('db', array("dsn"=>$dsn)); $pm = new Auth_prefemanager(array("dsn"=>$dsn)); These would all create seperate links and thus overhead, right? Or does (M)DB already check for an existing connection and use that if it can? Jeroen