Sessions at RubyConf 2011 about JRuby and JVM

Friday 30th September 2011

• Message in a Bottle

  by The Konstantin

  What does really happen when we call a method? How do the different Ruby implementations actually figure out what code to execute? What plumbing is going on under the hood to get a speedy dispatch? In this talk we will have a look at the internals of the four major Ruby implementations - 1.8, 1.9, JRuby and Rubinius, focusing on their dispatch. From look-up tables and call site caches, to inlining and what on earth is invokedynamic? Expect C, C++, Java, and, of course, Ruby code. But fear not, all will be explained!

  • JRuby
  • JVM
  • Programming Languages
  • Rubinius
  • Ruby

  At 10:25am to 11:10am, Friday 30th September

  Coverage slide deck video

• JRuby: Polyglot Heaven

  by Thomas Enebo and Charles Nutter

  JRuby is a top-notch Ruby implementation. It’s also your gateway to polyglot heaven. Ruby can do anything, but it’s not always the best tool for the job. With JRuby, you can take advantage of other JVM languages. Build part of your application in Clojure, taking advantage of its immutability and transactional guarantees. Build another part in Scala, leveraging its flexible static type system and actor libraries like Akka. Use JavaScript via Rhino to test pages or run JS on the server alongside Rails. Use Mirah to build fast-as-Java algorithms in a Rubilicious syntax. The JVM is a haven for polyglots, and JRuby’s your ticket to ride.

  • Clojure
  • JRuby
  • JVM
  • Scala

  At 11:15am to 12:00pm, Friday 30th September

  Coverage video