Ruby 4.0 Released With Ruby Box Isolation and New ZJIT Compiler

Ruby 4.0 Released With Ruby Box Isolation and New ZJIT Compiler

Written By
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Bobby Borisov
Jan 14, 2026

Ruby 4.0 is now available, introducing the experimental Ruby Box isolation feature, the new ZJIT compiler, and performance and concurrency improvements.

BB

Bobby Borisov

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