Backtor
Backtor is an experimental, thread-based backport of Ractor to earlier Ruby versions.
Since it's based on Ruby's Thread mechanism, you don't get the true
concurrency of Ractors, but it does mean that you can write applications using
Ractor and still have them work at a reduced speed in Ruby 2.
This is still a work in progress! The basic yield/take and send/recv
mechanisms are implemented, but very little else.
Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/AaronC81/backtor.
License
The gem is available as open source under the terms of the MIT License.