yaroslav/kino: A high-performance Ractor web server for Ruby 4.0+: Rack 3-based, with a Rust Tokio/Hyper front-end and Ractor-parallel Ruby workers and threaded fallback mode.
19-Jun-2026 7
Ruby threads cannot run Ruby code in parallel, so production setups fork a process per core and pay for each copy in memory. Kino runs your code on every core in one small process. A Rust (tokio + hyper) front-end owns the network, parallel Ractors run your Rack 3 app, and a threaded fallback mode runs everything else, Rails included.
yaroslav/kino: A high-performance Ractor web server for Ruby 4.0+: Rack 3-based, with a Rust Tokio/Hyper front-end and Ractor-parallel Ruby workers and threaded fallback mode. #ruby #rubydeveloper #rubyonrails #yaroslav/kino: #high-performance #Ractor #server #4.0+: #3-based, #Tokio/Hyper #front-end #Ractor-parallel #workers #threaded #fallback #mode. #rust #server #threaded #web https://www.rubyonrails.ba/link/yaroslav-kino-a-high-performance-ractor-web-server-for-ruby-4-0-rack-3-based-with-a-rust-tokio-hyper-front-end-and-ractor-parallel-ruby-workers-and-threaded-fallback-mode
