You are way slower with Golang because of it's types and the need to repeat yourself. I found that in a big project 2% of all of the code is exact this line of code: if err != nil { . But their channels are unmatched by anything I know (I don't know Erlang) . I sometimes miss strict types for channel-based code when I do core.async but you can't have all of the benefits of both because golang runs mutable and there are different problems when you use channels.