Quite a few things. The Go version was written by a person enthusiastic and presumably competent in Go. See their perspective here where he concedes defeat on

Quite a few things. The Go version was written by a person enthusiastic and presumably competent in Go. See their perspective here where he concedes defeat on the performance front: http://blog.nella.org/mqtt-code-golf/ http://blog.nella.org/mqtt-code-golf/ Adding C as a baseline is entirely appropriate. The source code for C, Go, and D is available. The Erlang version may or may not at the discretion of its author. Probably a more sensible hypothesis is that you like Go and saw a result that is unfavorable to it, so you had an emotional response.