[FrameworkBundle] added a note about why we cannot include Controller in the compiled classes

src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php

@@ -136,6 +136,8 @@ class FrameworkExtension extends Extension
             'Symfony\\Bundle\\FrameworkBundle\\EventListener\\RouterListener',
             'Symfony\\Bundle\\FrameworkBundle\\Controller\\ControllerNameParser',
             'Symfony\\Bundle\\FrameworkBundle\\Controller\\ControllerResolver',
+            // Cannot be included because annotations will parse the big compiled class file
+            // 'Symfony\\Bundle\\FrameworkBundle\\Controller\\Controller',
             'Symfony\\Bundle\\FrameworkBundle\\ContainerAwareEventDispatcher',
             'Symfony\\Bundle\\FrameworkBundle\\HttpKernel',
         ));