That is true. I have not looked at the much of the clojure code and non of the go code but both probebly are written in a very unidiomitic style that one does normally not use.

Also with clojure, the actual timeconsuming calculations can be made with java and that should be at least as fast as go (with a bit more memory).

So all in all I value the architectural things much more then pure speed. Go simply has a diffrent target then Clojure.