This behavior could be explained in a lot fewer words in a Rust tutorial, too. The investigation itself is kind of interesting and learning to use profiling to

This behavior could be explained in a lot fewer words in a Rust tutorial, too. The investigation itself is kind of interesting and learning to use profiling tools is valuable. It's still more verbose than my preference, and I don't love the style. Still. This and K&R are very different kinds of material.