Look at page 20 of these PGCon slides: https://www.pgcon.org/2014/schedule/events/754.en.html
I also published the methodology along with results in the pdf files I originally posted to the DragonFly mailing-lists. Direct link to one of these: http://dl.wolfpond.org/benchs/Pg-benchmarks.2012-10.pdf
Nice report btw
Nice report btw