title: Rails 4 - Difference between //= require jquery.ui.all or use a CDN
body: <p>I was wondering what the difference or advantages between the following is:</p>
  
  <p>insert <code>//= require jquery.ui.all</code> in the file <code>application.js</code></p>
  
  <p>AND</p>
  
  <p>insert <code>javascript_include_tag "jquery-ui-1.10.4.min"</code> into the
      layout (<code>application.html.erb</code>).</p>
  
  <p>In my point of view, I can see appeal in both of the propositions, because the first one does a lots of requests while the second one includes all in just one request !</p>