Blackfire.io allows PHP developers to measure and improve the performance of their apps in development, testing and production. It allows you to drill down to the function/method call level to identify and fix performance bottlenecks. It's easy to add it to your development and testing workflows thanks to its wide range of automation options.
The Blackfire Player is an Open Source Web Crawler, Web Tester and Web Scraper that allows teams to set up a fully automated testing process.