See also (Sorry, mainly in Japanese)
http://go-talks.appspot.com/github.com/lestrrat/go-slides/tree/master/2014-golangstudy-HDE
http://go-talks.appspot.com/github.com/lestrrat/go-slides/2014-yapcasia-go-for-perl-mongers/main.slide#1
Yapceu 2015 yapc asia tokyo behind the scenes (w/o notes)lestrrat
Slides with notes are at http://lestrrat.ldblog.jp/YAPCEU2015-YAPCASIA_Behind_The_Scenes.pdf
This is a talk I gave at YAPC::EU 2015 in Granada.
It's based on the talk I gave at YAPC::NA in Salt Lake City, but because this was AFTER YAPC::Asia Tokyo 2015, I have a lot more concrete numbers that I can share.