title: confusing about autoload_paths vs eager_load_paths in rails 4
body: <p>I read a post about the rails load_paths, here is the <a href="http://hakunin.com/rails3-load-paths" rel="noreferrer">link</a>.</p>
  
  <p>But, I am still confused about the difference between the <code>autoload_paths</code> and <code>eager_load_paths</code>:</p>
  
  <p>I have tested them in a newly created Rails 4 project.  It seems that they run the same way, that auto-reload in the development mode but in the production mode.</p>