Speeding up our Rails CI with Github actions and parallel_tests

This article outlines how we used parallel_tests and Github Actions to bring our CI times down from 25 to 10 minutes. It starts with an overview of our previous setup and its challenges, we them move on to setting requirements, the research we conducted, and the proof of concepts we tried out. We then discuss the implementation phase, highlighting some decisions we took along the way. The experiences and strategies shared in this article may hopefully offer useful ideas for you to enhance your own CI process.