title: First HTTPS connection is very slow in Internet Explorer 11, what can it be?
body: <p>When using Internet Explorer 11 to connect to a HTTPS site of my company, the first connection is very, very slow. Usually more than 30 seconds. After this first connection, I can browse the site with no problem. The problem just happens in Internet Explorer, it works fine in Chrome and Firefox. </p>
  
  <p>If after the first visit, I clear the cache and cookies, the next page load is quick. I have to close the browser and reopen it to reproduce the problem. Even if I let the browser idle for a couple of hours, the next visit is still quick. The problem is just in the first visit of a browser to this site. </p>
  
  <p>Below you can see the network view of the developer toolbar:
  <img src="https://i.stack.imgur.com/EhjEX.png" alt="Network view"></p>
  
  <p>The first connection is a HTTP connection that redirects to a HTTPS connection. This connection is very slow. The two following connections are quick. If I close my browser and visit directly the third URL via HTTPS, it will also load slowly.</p>
  
  <p>Here is the Timing in the Detail view (sorry, I can't change my company browser language to English):
  <img src="https://i.stack.imgur.com/CvqTb.png" alt="Detail timing view of problematic request"></p>
  
  <p>What can it be? How do I debug it? With this problem, it is very hard to execute automated web tests. </p>