Asynchronous Patterns for Ruby Based on Pure MRI CRuby code The goal is to use the original MRI C libs for achieve real async processing in ruby

This is good for where cpu focused for included, for example csv transformation

require 'asynchronous'

thr = Asynchronous::Thread.new do
    "some expensive work"
end

thr.value #> "some expensive work"

require 'asynchronous/core_ext'

thr = async do
    "some expensive work"
end

thr.value #> "some expensive work"

Parallelism:

• A condition that arises when at least two threads are executing simultaneously.

Concurrency:

• A condition that exists when at least two threads are making progress.
• A more generalized form of parallelism that can include time-slicing as a form of virtual parallelism

Concurrency is when two tasks can start, run, and complete in overlapping time periods. It doesn't necessarily mean they'll ever both be running at the same instant. Eg. multitasking on a single-core machine.

Parallelism is when tasks literally run at the same time. Eg. on a multicore processor.