title: What is the fastest XML parser in PHP?
body: <p>for a certain project, I need some way to parse XML and get data from it. So I wonder, which one of built-in parsers is the fastest?</p>
  
  <p>Also, it would be nice of the parser could accept a XML string as input - I have my own implementation of thread-safe working with files and I don't want some nasty non-thread-safe libraries to make my efforts useless.</p>