Blackfire is a SaaS solution to automate test about performance on PHP application. You can refer to the official website for more information.
Using Blackfire on Scalingo
Blackfire is part of Scalingo PHP buildpack. To install the Blackfire agent on your application, define both environment variables:
The content of these variables is in Blackfire dashboard.
After defining these variables, redeploy your application for the changes to take effect.