ZJIT has been merged into RubyFollowing Maxime’s presentation at RubyKaigi 2025, the Ruby developers meeting, and Matz-san’s approval, ZJIT has been merged into Ruby. Hurray! In this post, we will give a high-level overview of the project, which is very early in development. ZJIT is a new just-in-time (JIT) Ruby compiler built into the reference Ruby implementation, YARV, by the same compiler group that brought you YJIT. We (M
