https://www.howtogeek.com/ruby-40-update-brings-zjit-isolation-features-and-more/
Ruby 4.0 update brings ZJIT, isolation features, and more
This Christmas update comes with a lot of boosts to the language.
update bringsrubyzjitfeatures
https://www.infoworld.com/article/4113436/ruby-4-0-0-introduces-zjit-compiler-ruby-box-isolation.html
Ruby 4.0.0 introduces ZJIT compiler, Ruby Box isolation | InfoWorld
Jan 6, 2026 - Ruby Box is an experimental feature that provides separate spaces in a Ruby process to isolate application code, libraries, and monkey patches.
rubyintroduceszjitcompilerbox
https://speakerdeck.com/k0kubun/ruby-release-30th-anniversary-party
ZJIT: The Ruby 4 JIT Compiler / Ruby Release 30th Anniversary Party - Speaker Deck
Dec 20, 2025 - https://rubyassociation.doorkeeper.jp/events/190436
jit compilerzjitrubyrelease