I bet you are writing unit tests for your apps; if not, you probably feel ashamed. But what about performance? Everyone is talking about it but very few people actually integrate performance into their development workflow... After some quick theory, I will show you how to use xhprof and xdebug, two popular tools to profile PHP applications. Then, I will introduce you to Blackfire, a new profiler that makes it so easy to profile your apps that you won't have any more excuses for not doing it.
Finally, I will talk about my new holy grail: Continuous performance profiling.