Puma

A Modern Concurrent Web Server for Ruby

Puma launched on July 8, 2015 with 2 votes. The site was still online in September 2026, 11 years on.

What it does

Puma - A Fast, Concurrent Web Server for Ruby & Rack.

Unlike other Ruby Webservers, Puma was built for speed and parallelism. Puma is a small library that provides a very fast and concurrent HTTP 1.1 server for Ruby web applications. It is designed for running Rack apps only. What makes Puma so fast is the careful use of a Ragel extension to provide fast, accurate HTTP 1.1 protocol parsing. This makes the server scream without too many portability issues. Puma comes from a long line of ruby webservers derived from Zed Shaw's seminal work on Mongrel. The primary element that remains is Mongrel's great HTTP parser written in ragel and executed in either C or Java, depending on the ruby implementation. Evan Phoenix looked at Mongrel and saw a…from puma.io

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