Duby has become Mirah, and though I have not personally had a lot of time to work on it, it has continued slowly forward. It is basically just Ruby syntax for writing Java, though, so it performs identically to Java.
I don't know the status of Groovy performance in general. I do know that on small numeric benchmarks, JRuby + invokedynamic beats fully-dynamic Groovy, but you can "cheat" and static-type some numeric logic in Groovy, which puts it out in front again.
I don't know the status of Groovy performance in general. I do know that on small numeric benchmarks, JRuby + invokedynamic beats fully-dynamic Groovy, but you can "cheat" and static-type some numeric logic in Groovy, which puts it out in front again.