[thijsr]

Yes, the CPU self-reported power usage is indeed fairly noisy. We've tried to mitigate this by executing certain tests multiple times in a row, and using the average power consumption across these executions. However, this is data is still quite noisy and is influenced by external factors, like the operating system, your hardware, power management settings, and a lot more. We mention this and possible mitigating actions in the README.

We chose for a test harness because one of our goals was to make it as easy as possible to run it on existing Rust projects. A lot of projects define tests, but benchmarks are not often not present. But maybe a bench harness would be a better and/or cleaner approach, will look into it!