title: Eclipse war export: optimize for a specific server runtime
body: <p>In eclipse, when exporting a web project to <code>war/ear</code> file there is this option </p>
  
  <blockquote>
    <p>"Optimize for a specific server runtime"</p>
  </blockquote>
  
  <p><img src="https://i.stack.imgur.com/Wolur.png" alt="optimize for specific server runtime"></p>
  
  <p>What does happen under the hood when this option is selected? Couldn't find an explanation about that so far.</p>
  
  <p>I am running <code>Eclipse Indigo 3.7</code>.</p>