Gem Version Build Status Coverage Status MIT licensed

LightIO is a ruby networking library, that combines ruby fiber and fast IO event loop.

The intent of LightIO is to provide ruby stdlib compatible modules, that user can use these modules instead stdlib, to gain the benefits of IO event loop without care any details about react or async programming.

See Wiki and Roadmap to get more information.

LightIO is build upon nio4r. Get heavily inspired by gevent, async-io.


Add this line to your application's Gemfile:

gem 'lightio'

And then execute:

$ bundle

Or install it yourself as:

$ gem install lightio


Please see LightIO Wiki for more information.

The following documentations is also usable:



After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to


Bug reports and pull requests are welcome on GitHub at This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.


The gem is available as open source under the terms of the MIT License.

Copyright, 2017, by Jiang Jinyang

Code of Conduct

Everyone interacting in the Lightio project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.