My site is slow, what can I do? - Profiling PHP applications

It's nothing new that speed is important for the success of any web application. This talk will show how you can correctly measure the performance of your site and track down bottlenecks with tools like Xdebug, XHProf or the Symfony Debug Toolbar. And if you still need to get faster after optimizing and fixing all these issues, I'll introduce you to some tricks, techniques and patterns to even further decrease load times.