Javascript's ubiquity and increasingly fast VMs have made it an interesting runtime for languages. InfoQ looks at languages and tools that compile to Javascript: CoffeeScript 1.0, StratifiedJS ...

Apple integrates LLVM compiler to boost WebKit JavaScript performance Since compilers already make fast code, why not take advantage?

TypeScript, Microsoft’s JavaScript for big applications, reaches version 2.0 New compiler takes steps to undo the billion dollar mistake.