It's really not that hard, I think you are making this trivial benchmarking task sound complicated. The link to source code is there. It uses BenchmarkRunner c

It's really not that hard, I think you are making this trivial benchmarking task sound complicated. The link to source code is there. It uses BenchmarkRunner class, which handles warmup and multiple runs. I am assuming author ensured that stddev was small enough that the raw numbers is valid. And with 11MB file size, it will certainly be cached between runs - even if something else evicts the cache, it will show up as high stddev and then presumably author would rr-run it again on quiter systems.