How the benchmark works?

[T1m]

Hi, could you please explain to me how the benchmark works. The algorithm itself interests me. Can you explain it step by step?

The point is that I need to write tests using a different library. Then I will compare the results, that is, the indicators should be the same.

I would be grateful if someone could explain the order of execution of the benchmark using the example of MD5 with explanations on the source code.