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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. If you are using Bundler, just add Puma to your project's Gemfile. Once you've installed your bundle, start Puma. If you are not using Bundler, you can install Puma directly from the command line. On MRI, there is a Global VM Lock (GVL) that ensures only one thread can run Ruby code at a time. But if you're doing a lot of blocking IO (such as HTTP calls to external APIs like Twitter), Puma still improves MRI's throughput by allowing IO waiting to be done in parallel.
Features
- Puma also works well with Ruby (MRI) and JRuby
- Simple, fast, multi-threaded, and highly concurrent HTTP 1.1 server for Ruby/Rack applications
- Puma processes requests using a C-optimized Ragel extension
- Concurrent Ruby implementations (JRuby, Rubinius) will use all available CPU cores
- Each request is served in a separate thread
- Puma will install/compile with support for ssl sockets, assuming OpenSSL development files are installed on the system
Project Samples
