At trivago, we love measuring everything. Collecting metrics and making decisions based on them is natural to our engineers. We follow this workflow also with performance, which is key to succeed in the modern Internet. In this talk, we're going to describe how we integrated Blackfire profiling into the daily workflow of QA Engineers and Software Developers alike. How our own tooling around Blackfire has helped us to keep (and improve) performance over the last year. We will discuss the benefits of enforcing backend performance budgets. Also, we will explain our entire pipeline for PHP continuous monitoring.