title: Performance Problems using System.js
body: <p>I'm playing around with system.js (inspired by angular2 using it for their tutorials), but I get ridiculously bad performance even for the most trivial sample. </p>
  
  <p>For example the following code has a delay of 26000ms(!) between the second (the one before <code>System.import</code>) and last (in <code>app.js</code>) console.log while running locally (so no network delay)</p>
  
  <p>index.html:</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html lang="en"&gt;
  &lt;head&gt;
      &lt;title&gt;System.js Sample&lt;/title&gt;
      &lt;script&gt;console.log("1: " + new Date().getTime());&lt;/script&gt;
      &lt;script src="bower_components/system.js/dist/system.js"&gt;&lt;/script&gt;
  &lt;/head&gt;
  &lt;body&gt;
  &lt;script&gt;
      console.log('2: ' + new Date().getTime());
      System.import('app.js');
  &lt;/script&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>App.js:</p>
  
  <pre><code>console.log('3: ' + new Date().getTime());
  </code></pre>
  
  <p>I installed the newest system.js version via bower ("system.js": "~0.18.17") and removed all the remaining code it's really just the System.import call that takes ages. So what am I doing wrong?</p>
  
  <p>Picture of the Network tab when loading the page under Chrome:
  <a href="https://i.stack.imgur.com/lQlIw.png" rel="noreferrer"><img src="https://i.stack.imgur.com/lQlIw.png" alt="enter image description here"></a></p>