Good explanation about how sampling works. Does a good job explaining why it shines and where it is limited.

This is lesser known and probably should stay obscure... don't do that at home kids. Those alternative operators (more like tokens really) don't help with readability at all and make not much sense with UTF8 code bases.

Looks like a young but interesting tool to assess the power consumption of a service. There's been quite some work in this domain on the client side, not so much on the server side. This is welcome.