Ruby 4.0.0 Released — major features Ruby Box, ZJIT, Ractor upgrades
TL;DR Ruby 4.0.0 is now available, introducing an experimental isolation feature called Ruby Box, a new JIT compiler named ZJIT,…
Ruby 4.0.0 Released: Ruby Box, ZJIT JIT and Broader Concurrency Updates
TL;DR Ruby 4.0.0 was released on December 25, 2025, introducing an experimental isolation feature called Ruby Box and a new…