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Original author(s)Francis Cianfrocca
Initial releaseApril 13, 2006; 13 years ago (2006-04-13)
Stable release
1.2.3 / February 23, 2017; 2 years ago (2017-02-23)
Repository Edit this at Wikidata
Written inRuby
Operating systemMicrosoft Windows, OS X, Linux
TypeEvent-driven networking
LicenseGPL or Ruby License

EventMachine is a software system designed for writing highly scalable applications for Ruby. It provides event-driven I/O using the reactor pattern. EventMachine is the most popular library for concurrent computing in the Ruby programming language.[1]

Example uses[edit]

EventMachine has been used to build a number of different libraries and frameworks in which concurrency is a performance concern. Some examples include:[2]

  • critical networked applications
  • web servers and proxies
  • email and IM production systems
  • authentication/authorization processors

See also[edit]


  1. ^ "The Ruby Toolbox - Concurrent Processing". Retrieved September 27, 2012.
  2. ^ "EventMachine README". Retrieved September 27, 2012.

External links[edit]