In this workshop, you will learn how to design and conduct experiments to help develop software that is both efficient and environmentally friendly. You will learn why it is useful to be able to do your own experiment and how to conduct a simple experiment in four easy to follow steps: Identify a question, design the experiment, run the experiment, and publish the results. This is a hands-on workshop where most of the time will be dedicated to letting each participant identify, design, conduct. It is therefore important that all participants bring computers that can be used to create and run code. If, at any point, you are stuck, help will be available to point you in the right direction and there will be several examples ready to provide inspiration for moving forward. You will also be given an opportunity to report on your own experiments and learn from the experiments of other participants. Finally, and most importantly, you will have fun finding answers to questions about efficient and green code and, more likely than not, discovering new questions you would like to find answers to.