bjoern: Fast And Ultra-Lightweight HTTP/1.1 WSGI Server A screamingly fast, ultra-lightweight WSGI server for CPython 2 and CPython 3, written in C using Marc Lehmann's high performance libev event loop and Ryan Dahl's http-parser. Why It's Cool bjoern is the fastest, smallest and most lightweight WSGI server out there, featuring ~ 1000 lines of C code Memory footprint ~ 600KB Python 2 and Python