title: How to improve PHP performance?
body: <p>I've created PHP application for Facebook. It uses MySQL, Memcached and works on Lighttpd on Centos 2,6 Ghz and 2 GB RAM.</p>
  
  <p>it's basically one PHP file that after first run is cached and every next time it's served in 0,8 ms directly from Memcached.</p>
  
  <p>What more can I do to shorten this time?</p>