Ruby 3x3 is a plan to make Ruby 3 times faster than Ruby 2.x. Here's some further reading:

http://engineering.appfolio.com/appfolio-engineering/2015/11...

https://blog.heroku.com/where_will_ruby_go_now_talking_with_... https://www.reddit.com/r/ruby/comments/3tje5a/ruby_3x3_ruby_...