* Write a new benchmark/README.md describing the benchmark
directory layout and common API.
* Fix the moved benchmarking guide accordingly, add tips about how
to get the help text from the benchmarking tools.
PR-URL: https://github.com/nodejs/node/pull/11237
Fixes: https://github.com/nodejs/node/issues/11190
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Andreas Madsen <amwebdk@gmail.com>