Maciej Fijalkowski also sent me the following article a few months ago, it also explains indirectly why using the minimum for benchmarks is not reliable:

"Virtual Machine Warmup Blows Hot and Cold"
http://arxiv.org/pdf/1602.00602.pdf

Even if the article is more focused on JIT compilers, it shows that benchmarks are not straightforward but always full of bad surprises.

A benchmark doesn't have a single value but a *distribution*. The best question is how to summarize the full distribution without loosing too much information.

In the perf module I decided to not take a decision: a JSON file stores *all* data :-D But by default, perf displays mean +- std dev.