From the author:

> Even though Clojure might be a more obvious choice for someone, like me, who is used to working with the JVM, I actually wanted to try using something else with a lighter runtime and great performance.

I just used a Clojure library from a Kotlin project via Java interop. And it wasn't even weird.

Or Armed Bear Common Lisp.

Unless you go out of your way in writing non-idiomatic Clojure like in Java with parenthesis Clojure, Clojure will the slowest of the three by far.