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.
L. Bing, R. Guo, W. Lam, Z. Niu, и H. Wang. Proceedings of the 37th International ACM SIGIR Conference on Research &\#38; Development in Information Retrieval, стр. 767--776. New York, NY, USA, ACM, (2014)