I am trying to port hub (https://github.com/defunkt/hub) to Go (https://github.com/jingweno/gh), not by any chance better yet, but feel free to provide any feedback :)
There're more benchmark available on the README now: https://github.com/jingweno/gh/blob/master/README.md https://github.com/jingweno/gh/blob/master/README.md