I stumbled upon the reimplementation of the very limited wc unix utility functionality in Haskell by Chris Penner, and have it redone in pure Elixir.

In this post I cover the whole “optimization” process, starting from naïve implementation and walking down the road with generated pattern-matching clauses and using Flow to make it concurrent with two lines of code.

Spoiler: I was able to beat C and be even with the aforementioned Haskell solution.

https://rocket-science.ru/hacking/2020/02/22/wc-in-elixir