First example in README is invalid

[robsmith11]

The first example in the README @btime sin(1) (no longer?) measures anything meaningful because the expression is constant-folded, which makes it a rather poor demonstration of how to use BenchmarkTools.

A better example should be used and perhaps a section could be added on avoiding situations like this.

See also
https://discourse.julialang.org/t/benchmarktools-with-simple-fast-running-function/21049/2

[tamasgal]

Yep, I just ran into this when I dug out some old slides to recycle for a Julia talk.

This should be fixed as soon as possible, it's indeed misleading ;)