That would take even longer for serious production to switch to Rubinius. Especially when people have invested a lot in terms of learning how to boost MRI performance to the last drop.
Yes, it would not be a painless change. But neither has the switch from 1.8 to 1.9 been pain-free. Just because it's hard doesn't mean it's not worth doing.
Fair enough. But I meant "fast" relative to Ruby 1.9.2, not "fast" relative to anything else. The "require" issue aside, REE beats out 1.9.2 pretty handily in a lot of real world situations. I've seen 1.9.2 win in microbenchmarks, but I haven't actually seen it perform better on a real app yet. Obvious selection bias there, but the point really being there's no compelling reason to upgrade.
