Introduction paragraph: asm.js is ... it is cool because ... in this article we will...
What is asm.js, from a high level?
What speed improvements does asm.js confer? Where is it most (and least) effective? Can we see some benchmark data?
What optimizations does it rely on? How do they work? Provide simple examples.
How can you make use of asm.js?
Examples, hints, tips, unicorns.