ori-rb

https://github.com/jahfer/ori

Ori is a library for Ruby that provides a robust set of primitives for building concurrent applications. The name comes from the Japanese word 折り "ori" meaning "fold", reflecting how concurrent operations interleave. Ori provides a set of primitives that allow you to build concurrent applications—that is, applications that interleave execution within a single thread—without blocking the entire Ruby interpreter for each task.