There are two very good comments at the bottom of the article. Here for your consumption: Author: (Unknown) 2015-01-19 12:54 UTC io.js based on node v0.11, s

There are two very good comments at the bottom of the article. Here for your consumption: Author: (Unknown) 2015-01-19 12:54 UTC io.js based on node v0.11, so you need compare - v0.10 (nodejs)- v0.11 (nodejs) - v0.11 (nodejs)- v1.0 (iojs) Author: Michael Schöbel 2015-01-19 13:01 UTC I also downloaded sources and compiled the latest master branch of Node yesterday evening. Performance was within 2% of io.js for all three tests. But most people won't compile themselves. Most will use the latest stable release.