[pomartel]

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.

[arikrak]

Thanks for your answer (here and on SO). I guess I'll wait it out...