You can install this via npm:
#> npm install -g mysql-bindings-benchmark
Also includes benchmarks written in PHP and C++.
Some of my (Sannis') benchmark results: https://github.com/Sannis/node-mysql-bindings-benchmarks/wiki.
To contribute any patches, simply fork this repository using GitHub and send a pull request to me (http://github.com/Sannis). Thanks!
MIT License. See license text in file LICENSE.
Bindings licenses you can read in their repositories. At this moment all of them are MIT-licensed.