title: how much CSS sprite reduce page loading time?
body: <p>I know you can reduce page load time by using CSS sprite. As this will reduce round trip, etc.</p>
  
  <p>Is their any numerical value or performance test that by using CSS sprite how much average page loading time you can save. I know this will depend on the site. I am interested to know about a general data for e commerce site like Amazon.com</p>
  
  <p>Besides, if you use async image loading like <a href="https://github.com/sebarmeli/JAIL" rel="nofollow">JAIL</a> how much time you could save. I know u can't load everything asynchronously.</p>