Jira issue originally created by user @beberlei:
The old result cache should be reintroduced as hydration cache, since it obviously is much faster than just result caching by avoiding hydration.
$users = $this->_em->createQuery($dql)
->setHydrationCacheProfile(new QueryCacheProfile(null, null, $cache))
Comment created by @beberlei:
Implemented Hydration Cache.
Issue was closed with resolution "Fixed"