Anyone know how Ruby 2.2 works with Rails on Heroku (with unicorn)? When I switched from 2.0 to 2.1, it caused all sorts of memory problems so I had to switch back.
I gave Ruby 2.2 a try with Rails 4.2 and the same memory problems that plagued Ruby 2.1 also occurred. I am switching back to Ruby 2.0. Rails 5 will require Ruby 2.2 and higher so I hope someone will find a way to fix this.
As for performance, I think we'll have to wait to hear from adventurous souls who use this, or who have been using the rc's.
Hopefully you've been using New Relic and can see how memory usage on your dynos changes.