Making an application scale is generally seen as something that only the most magical of developers can do, but it is easy once you have the correct tools. Fortunately for us, these tools are freely available online! In this talk, we will look at a few available options to learn what our applications are actually doing, help identify bottlenecks, and fix them so we can move on to the most important part of any project: delivering features.

How to use Tideways with XHProf UI to profile PHP code in Drupal VM.