title: How does Google serve results so fast?
body: <p>Time and again when I search for a topic on Google,
  Google returns me the results and also prints out some stats like</p>
  
  <p>"Results 1 - 10 of about 8,850,000 for j2me. (0.24 seconds)"</p>
  
  <p>I notice that the seconds taken by Google to serve the results are in fraction of a second range.</p>
  
  <p>How does Google serve pages so fast, what kind of database optimization tricks has it used at its end?</p>