Incidentally, I implemented PUSH in Clojure myself, several years ago. The language is well designed, it's a good match for genetic algorithms — you need someth

Incidentally, I implemented PUSH in Clojure myself, several years ago. The language is well designed, it's a good match for genetic algorithms — you need something which is interpretable after mutations, and very few languages provide that. I learned a lot about Clojure performance while doing that work. It's funny how most of that knowledge is now obsolete anyway (because both Clojure and the JVM evolved so much).