Benchmarking compilation times

[MartinHH]

It would be helpful to have a setup that allows to benchmark compilation times. This would allow to observe the effect changes to the derivation mechanism may have on the compilation time (of derivation of typeclasses).

This blog post might be a good start: https://www.scala-lang.org/blog/2018/06/04/scalac-profiling.html - or maybe there are other sources?

Futhermore, one would probably need to have one or more reference projects with a sufficient amount of derivation (maybe even one for each typeclass (Arbitrary, Cogen, Shrink)). Using the test code of this project might be problematic as it will change over time (while the reference project should ideally remain unchanged).

[MartinHH]

I implemented something for a start: https://github.com/MartinHH/scalacheck-derived-profiling