Ruby 4.0: ZJIT, Ruby Box, and Ractors
Originally appeared on The Rails Tech Debt Blog.Ruby 4.0 was released on December 25, 2025, and three features get cited most often when people talk about it: ZJIT, Ruby Box, and a...
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Originally appeared on The Rails Tech Debt Blog.Ruby 4.0 was released on December 25, 2025, and three features get cited most often when people talk about it: ZJIT, Ruby Box, and a...
Originally appeared on Ruby Weekly. #​815 — September 3, 2026 Read on the Web Ruby Weekly ZJIT 🤝 GC: Inli...
Originally appeared on Peter Zhu.Object allocations from the garbage collector are now inlined in ZJIT.
Originally appeared on Rails at Scale. It’s been 8 years since the first just-in-time compiler was introduced in Ruby. However, throughout this time, the garbage collector has bee...
Originally appeared on Rails at Scale. We recently enabled a really cool feature in ZJIT that makes it feel like a Real Compiler™: the inliner! We’ll write more about it soon. In...
Laurence Tratt discusses yk, an open-source meta-tracing JIT compiler framework. He shares how to automatically speed up C-based language interpreters like Lua and MicroPython with...
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