title: How does Stackoverflow prevent the "white flash" between page loads?
body: <p>I have noticed on StackOverflow.com (and other large professional sites such as Wikipedia.org) that when you navigate from page to page, there is no "white flash" before each page load (i.e. the pages instantly transition from one to another). I am trying to do the same thing on my page, and I have tried everything I've read about:</p>
  
  <ol>
  <li>cache CSS</li>
  <li>cache JavaScript</li>
  <li>cache Images</li>
  <li>put JavaScript at bottom of page</li>
  </ol>
  
  <p>No matter what I try, there is still a ~10ms white "flash" that appears before each new page loads.</p>
  
  <p>How does StackOverflow handle this? I am aware of other similar questions about this here but I want to know how StackOverflow does it.</p>