A fantastic, fast regular expression engine that supports intersection, complement, and lookarounds in linear time, combining Brzozowski derivatives and lazy DFA construction.

https://iev.ee/blog/resharp-how-we-built-the-fastest-regex-in-fsharp/

RE#: how we built the world's fastest regex engine in F# | ian erik varatalu

ian erik varatalu
@thalia @alpha and in F#! Sensational