Unicorn is an HTTP server for Rack applications designed to only serve fast clients on low-latency, high-bandwidth connections and take advantage of features in Unix/Unix-like kernels. Slow clients should only be served by placing a reverse proxy capable of fully buffering both the the request and response in between Unicorn and slow clients.
H. Tong, C. Faloutsos, and J. Pan. ICDM '06: Proceedings of the Sixth International Conference on Data Mining, page 613--622. Washington, DC, USA, IEEE Computer Society, (2006)