Tony “Abolish ICE” Arcieri🌹🦀

Neat to see the new #Ruby 4.0 JIT is written in #Rust

https://railsatscale.com/2025-12-24-launch-zjit/

Merry Christmas from Matz!

ZJIT is now available in Ruby 4.0

ZJIT is now available with the release of Ruby 4.0. Here’s an update of our progress.

Rails at Scale
Dec 25 at 3:42pmWeb
Show threadBart de WaterDec 25
@bascule YJIT (the previous one) was too: https://shopify.engineering/porting-yjit-ruby-compiler-to-rust
Our Experience Porting the YJIT Ruby Compiler to Rust - Shopify

In this post, I want to give a nuanced perspective on our experience porting YJIT from C to Rust. I'll talk about the positives, but also discuss the things that we found challenging or suboptimal in our experience.

Shopify