https://rubystacknews.com/2026/02/24/%f0%9f%a7%b5-ruby-4-concurrency-gets-real-understanding-ractorport-in-practice/

Ruby 4 continues to push the boundaries of safe parallel execution — but the most interesting evolution may not be speed, but architecture.

The introduction of Ractor::Port significantly improves how Ractors communicate, enabling explicit message channels, parallel pipelines, and actor-style designs inside a single Ruby process.