Reading through the documentation, it seems fine for creating a DSL, but not a whole language. I would be okay with the performance of Java, so long as I could

Reading through the documentation, it seems fine for creating a DSL, but not a whole language. I would be okay with the performance of Java, so long as I could have the ease and speed of coding of Ruby. For DSLs, that certainly seems possible... So long as I take the time to write all the Java code for it anyhow. That's great for DSL-type tasks (repetitive, or created by non-programmers), but I can't see writing a whole language this way.