His conclusion about Doctrine and other ORMs eating CPU and being the huge bottleneck in the app lines up with my experience using the same. The MVC framework i

His conclusion about Doctrine and other ORMs eating CPU and being the huge bottleneck in the app lines up with my experience using the same. The MVC framework itself, Symfony/Rails in his case, can indeed also be a huge bottle neck, though much less than the ORM yet higher than the DB calls themselves. That too has been my experience often.