What is Blackfire.io?
As stated on the official Blackfire website (https://blackfire.io), Blackfire empowers all developers and IT/Ops to continuously verify and improve their app's performance, throughout its life cycle, by getting the right information at the right moment. It is, therefore, a performance management solution that allows you to automatically profile your code and set performance standards through assertions throughout your application's life cycle, especially in the development phase. Blackfire.io is a tool that makes what Fabien Potencier calls performance as a feature possible, by making performance tests a part of the development cycle from the very beginning of a project.
Installing and configuring Blackfire.io
Installing and configuring Blackfire.io means setting up three components: the agent, the client and the PHP Probe. In the context of this book, we will be installing Blackfire.io inside our Linux for PHP container. To get more information on installing Blackfire...