Better Ruby - Nutter

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  • making optimizations for things like returining from closures
  • Invoke Dynamic (indy):
    • eliminates generated handles, simplifies things
    • inlines a lot of otherwise complex logic
    • getting faster
  • Duby is an experiment in optional static typing that may be rolled into JRuby
  • new optimizing compiler now that they have a "real compiler guy" on the JRuby team


  • a side-project
  • "like Ruby but as fast as Java; essentially Java with Ruby syntax"
  • typing works kinda like Scala
  • no runtime library
  • purpose: an implementation language for JRuby, mobile applications
    • "doesn't add too much"
  • code example: only different between Ruby and Duby is specifying the type of some arguments to methods
  • "" is hard-coded to object creation, not a method call
  • status:
    • type and method definitions work
    • importing types, Java object construction works
    • todo: arrays, reopening classes, mixins, closures, runtime libraries in Duby, Java 5 features,
    • possible LLVM backend or in other languages


  • another side-project
  • exactly Ruby syntax
  • dynamically typed ("not quite as crazily dynamic as Ruby")
  • dynamic dispatch (indy)
  • minimal runtime library (indy dispatcher)
  • scriptable, but no interpreter
  • "as fast as Java (can do indy)"
  • goals: experiment with indy, help the implementors test, try things outside JRuby
  • code examples: really identical to Ruby
  • bunch of stuff still to do
  • Java version of fib example (only) 40% faster than Surinx version