title: eval responseText/responseXML performance
body: <p>Does anyone readily know if using <code>eval()</code> and <code>responseText</code> (using JSON) is faster or slower than just using <code>responseXML</code>?</p>
  
  <p>I would imagine avoiding the <code>eval()</code> and using <code>responseXML</code> instead would be faster, despite the fact that you gotta write really long code to actually get the values of the XML.</p>
  
  <p>Thanks.</p>