Presentation: TweetJVM performance optimizations at Twitter's scale

Twitter is increasingly relying on services written in either Java or Scala and running on the JVM. While JVM gives us a world-class runtime in terms of operational stability, performance, and manageability, it is still not trivial to achieve the desired performance characteristics of the programs being run on it, especially when you're dealing with services that need lots of memory, or have very low latency requirements, or both. In this talk, we'll present examples of performance problems we encountered while operating JVM-based services and the ways we solved them.

Presentation: TweetMozilla Rhino

Mozilla Rhino is a JavaScript interpreter written in Java and running on the JVM. It's one of the oldest implementations of a non-Java language on the JVM platform, and has the distinguished honor of having a version of it being shipped in the Oracle JRE distributions as the default JVM scripting language. In this hands-on talk we'll discuss how to integrate Rhino into your JVM-based project, the Java-JavaScript bridging, as well as unorthodox features (i.e. first-class continuations) and newer features (support for CommonJS modules). You should come away from this talk with a good idea of what can Rhino do for you, and how can you easily make it do it.