Svalbard is quickly becoming a household name as customers all over the world bring the online store’s furniture into their homes. But Svalbard’s backend applications run on legacy mainframes that are increasingly expensive to scale. That’s why the store has adopted a more flexible modern deployment model. As a Rust programmer, your task is to provide its developers and operators with a load-testing CLI tool that simulates a multitude of real-world scenarios.

Using Tokio, Serde, and clap, you’ll add functionality for users to configure the number of connections and requests, as well as other parameters. You’ll gather and display immediate feedback, empowering users to spot and correct misconfiguration early on. You’ll calculate statistics on latencies in your application and display them in human- and machine-readable output, providing the maximum benefit from the gathered data. When you’re done, you’ll have a CLI that delivers users high configurability, reliable signal handling, and a means of providing immediate feedback for more nimble, cost-effective results.