High Scalability - High Scalability - Iron.io Moved From Ruby to Go: 28 Servers Cut and Colossal Clusterf**ks Prevented
http://highscalability.com/blog/2013/3/13/ironio-moved-from-ruby-to-go-28-servers-cut-and-colossal-clu.html sometimes language makes a difference ( i.e ruby is too low for a service stack )