puma 2.1.1
Puma is a simple, fast, threaded, and highly concurrent HTTP 1.1 server for Ruby/Rack applications. Puma is intended for use in both development and production environments. In order to get the best throughput, it is highly recommended that you use a Ruby implementation with real threads like Rubinius or JRuby.
Gemfile:
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install:
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Runtime Dependencies (1):
rack
< 2.0, >= 1.1