This document discusses Rhebok, a high performance Rack handler written in Ruby. Rhebok uses a prefork architecture for concurrency and achieves 1.5-2x better performance than Unicorn. It implements efficient network I/O using techniques like IO timeouts, TCP_NODELAY, and writev(). Rhebok also uses the ultra-fast PicoHTTPParser for HTTP request parsing. The document provides an overview of Rhebok,
![Rhebok, High Performance Rack Handler / Rubykaigi 2015](https://cdn-ak-scissors.b.st-hatena.com/image/square/0266b25989ef468128d9cce8e9f4b53e74e410b2/height=288;version=1;width=512/https%3A%2F%2Fcdn.slidesharecdn.com%2Fss_thumbnails%2Frubykaigi2015rheboknagano-151212142450-thumbnail.jpg%3Fwidth%3D640%26height%3D640%26fit%3Dbounds)