This is why I love HN. I'm actually working on a lightweight metrics system right now. This accurate little tool (and the author's article) is exactly what I needed right now.

My poison is vegeta, but one of the genius ideas behind both are HDR histograms, both as a design, as an implementation detail, and a data transport mechanism.

There are few production projects where I don't have a reason to depend on HDR histograms for various under the hood functionality.