Im assuming the JS refers to Janes street

That makes sense, I guess I've got web tunnel vision.

You can avoid GC in hot loops in F# with value-types, explicit inlining, and mutability.

Mutability may not result in very idiomatic code however, although it can often be wrapped with a functional API (e.g. parser combinators).

> This is what I like to call a dialect of OCaml. We speak in sometimes and sometimes we gently say it’s zero alloc OCaml. And the most notable thing about it, it tries to avoid touching the garbage collector ...