Open source tools for command-line load testing

Legion is a JavaScript-based load testing tool to control browsers via Selenium or generating API calls directly. It collects and merges performance metrics from various sources and includes a library that makes it quick and easy to describe a testcase.

It consists of two major components: legion-metrics, which collects and merges performance metrics from various sources; and legion-io, a Promise-based library that makes it quick and easy to describe a testcase.

---