Keith Adams shares HHVM insights showing how a system can become very performant if it is well tuned.
Guillaume Laforge introduces some of the new features in Groovy 2.1: better Invoke Dynamic, DSL-related annotation, grouping annotations, compiler customization.
Bjarne Stroustrup discusses features that might appear in C++14: braces for copy initialization, return type deduction in functions, generic (polymorphic) lambdas, user-defined literals, etc.
Alan Griffiths shares the organizational process, the technological challenges and the solutions adopted by a team developing a C++ systems component.
Tobias Darm discusses how some of the GoF patterns can be implemented differently in C++11 using Boost libraries.
Roman Gonzalez and Tavis Rudd discuss techniques for shortening the ClojureScript development cycle by using the same codebase for clj and cljs and automatically running tests on the JVM.
Joel Martin introduces cljs-in-cljs, a compiler for porting all of ClojureScript, including the Clojure top-half and other JVM specific code, to pure ClojureScript.
Nathan Sorenson discusses clojure-scheme, a ClojureScript compiler that translates Clojure code to Scheme code, showing how to compile this Schemified Clojure code to raw C or run it on iOS.
Alan Dipert introduces Javelin, a ClojureScript library, demonstrating how it can be used to express a variety of asynchronous workflows in concise and composable ways.
Timothy Baldridge presents clojure-py2, a compiler written in Clojure that uses LLVM for code generation.