title: scrolling is choppy in chrome when background image is fixed
body: <p>I'm trying to create a parallax website. But then I have an issue with fixed positioning.</p>
  
  <p>I have several sections , each with a <code>background-attachment:fixed</code>.
  A <code>position:fixed</code> menu bar on the top with an hidden element in it on top of all sections.
  A google map 100% with in one of the sections.</p>
  
  <p>Now, the problem is when I scroll the page with animation in google chrome, the scrolling does not go smooth and it flashes several times while scrolling.</p>
  
  <p>I do the scrolling with greensock scrollTo plugin , but that is not the problem as I also tested it with jquery <code>.animate()</code> method. Same result.</p>
  
  <p>I did a research , and found out that chrome has a bug or problem with Fixed positioning ( and sometimes when you put hidden element in it )
  Some pages suggested to use these two with the fixed elements :</p>
  
  <pre><code>-webkit-backface-visibility:hidden; 
  -webkit-transform: translateZ(0);
  </code></pre>
  
  <p>I added this to the fixed menu and some of the choppy behavior of it reduced , but still not smooth.
  If I add this to the sections with <code>background-attachment:fixed</code> elements, the scrolling animation goes smooth but does not act as fixed anymore.</p>
  
  <p>Somebodies says that chrome has problem with large images, some says it has issue with fixed position and somebodies had a solution that did not work for me :D</p>
  
  <p>I uploaded the page :
  <a href="http://www.FarzanMohajerani.com/test/parallax" rel="noreferrer">http://www.FarzanMohajerani.com/test/parallax</a>
  just click anywhere on the page to scroll.</p>
  
  <p>I also created a jsFiddle with the exact same code. But I don't know why it doesn't have the problem in jsFiddle :
      <a href="http://jsfiddle.net/Farzanmc/cRqxT/5/" rel="noreferrer">http://jsfiddle.net/Farzanmc/cRqxT/5/</a></p>
  
  <p>It would be great if anyone could direct me to the right solution or remind me if I'm doing anything wrong.
  Thanks</p>