ruby
Compiling a Rails app to a single native binary with Roundhouse and Spinel
Basecamp's Campfire, unchanged, compiled to one native binary: 5x the throughput on 366 MB instead of 4.6 GB. How Roundhouse lowers Rails, how Matz's Spinel compiler turns that Ruby into C, which Ruby constructs it refuses, and how far you can push it on your own app today.