[arthurschreiber]

As others have already pointed out, that has nothing to do with MVC, but is more a result of how template engines usually work.

E.g. in Rails, by default, due to the fact that you can have views provide content for your layout (using content_for), it has not been possible to start sending your rendered HTML before the rendering was completely finished.

There is an experimental Fiber based solution in Rails Core, that shipped with 3.2, that kind of fixes that issue, but only to a certain degree (see http://api.rubyonrails.org/classes/ActionController/Streamin...).