title: PHP: is JSON or XML parser faster?
body: <p>I'm building classes that interface with the Twitter API, and I'm wondering whether PHP's built-in XML or JSON parser is faster? Twitter will send me the same data in either format, so  PHP performance will determine my choice. I'm using php_apc, so you can disregard parse time and assume I'm running off bytecode.</p>
  
  <p>Thanks!</p>
  
  <p>more: I'm just looking to get associative arrays from the data. I'm not doing tree walking, node iteration or anything too complex. The format will always be the same. (I hope!)</p>