title: ext-all.js VS ext-all-debug.js
body: <p>What is the difference between using ext-all.js and ext-all-debug.js? </p>
  
  <p>Does changing to ext-all.js from debug.js improve performance? </p>
  
  <p>Can I assume that switching from debug to normal file will not have any other impacts on the application?</p>
  
  <p>Also, can any one suggest what ext-base.js do?</p>