What do you call the high-level concept of scientist?

[boxcleverliam]

Scientist is fantastic for Ruby development, but how would I find a similar library for other languages? I'm looking to do this in PHP and JS.

Is there a name for this technique or pattern of development? Having a control and a candidate and running both under load, to analyze the results - this is a pattern I have also used, but without good terminology to quickly communicate to others.

The Control / Candidate Pattern? Candidate Driven Development?

If there is a common name for this, it would be good to add it to the README.