In this lesson we have a performance problem with our Drupal CMS open source app and I show how to use Zend Server/Studio integration to profile the performance problem to better understand the root cause, then I solve the problem by using URL caching. My pages that use to render in 5sec were improved all the way down to 0.19sec to render, that’s an incredible 26 times performance improvement. See what you can do in your OSS app or custom PHP application with Zend Server and let me know …