title: First request to Rails app is very slow
body: <p>always the first request (of a working session) to my Rails app is lagging. Switching to production mode
  doesn't help.</p>
  
  <p>I use mongrel and the other requests are handled with acceptable speed.</p>
  
  <p>How do I make it faster?</p>
  
  <p>Regards</p>