These posts are more than 3 years old though. The latest spark/graphx should perform much better. I wonder if there's an updated study is available...
http://yellowstone.cs.ucla.edu/~yang/paper/sigmod2016-p958.p...
I wouldn't hold your breath on it getting faster.
Edit: and if you are interested in state-of-the-art stuff, here is a thread to start you out on the papers currently being presented at SIGMOD2018:
https://twitter.com/frankmcsherry/status/1002812204075364353