Cisco/IronPort open sourced Python Coroutine library Shrapnel (github.com)

This Python library was evolved at IronPort Systems and has been provided as open source by Cisco Systems under an MIT license.

Shrapnel is a high-performance threading/coroutine library built around FreeBSD's kqueue() system call. It's designed for single-process servers that can handle 10,000+ simultaneous network connections.