The JIT’s good and getting better. Takashi Kokubun keeps working on it constantly. It’ll be in the Ruby 2.6.0 Christmas release, and it was also in all the recent Ruby preview releases. Method inlining, one of the big speed benefits of JIT, is nearly here! It wasn’t in preview3, but it sounds like it’ll be there for Christmas. You can see more about the current state of Ruby 2.6 JIT in Takashi’s slides from RubyConf (current as of Nov 2018.)
Wondering if Ruby 3x3 will actually be three times faster than Ruby 2.0? Those same slides put OptCarrot at 2.53x faster with the current changes. I think we’ll make it to 3x!
