Overview With more and more developers utilizing cloud services for hosting, it is critical to understand the performance metrics and limits of your application. First and foremost, this knowledge helps you keep your infrastructure up and running. Just as important, however, is the fact that this will ensure you are not allocating too many resources and wasting money in the process. This post will describe how Kongregate utilizes Locust.io for internal load testing of our infrastructure on AWS, and give you an idea of how you can do similar instrumentation within your organization in order to gain a deeper knowledge of how your system will hold up under various loads. What Is Locust.io? Locust is a code-driven, distributed load testing suite built in Python. Locust makes it very simple to create customizable clients, and gives you plenty of options to allow them to emulate real users and traffic. The fact that Locust is distributed means it is easy to test your system with hundreds of thousands of concurrent users, and the intuitive web-based UI makes it trivial to