Major YJIT Improvements in Ruby 3.2Ī lot has happened for YJIT in 2022. I’ll take this opportunity to say that I’m very thankful to Shopify for letting us take on some risks, and to the Ruby community for being so open-minded. Upstreaming YJIT had been an aspirational goal for the team from the start, but we had never thought it would happen this fast. Following that, the CRuby core contributors invited us to upstream YJIT, and so YJIT was released as an official part of Ruby 3.1 in December of 2021. There were many long, intense debugging sessions involved, but within just over a year, we’d managed to deliver roughly 20% speedups on railsbench. To my surprise, my manager and two colleagues were immediately on board with this idea, and what would become the YJIT project was born.īuilding YJIT was hard work. Since my background is in compiler design, I started to discuss with my manager the possibility that we could build a relatively simple Just-In-Time (JIT) compiler for Ruby. Our team focuses on making sure that Ruby as well as Ruby on Rails, central to the infrastructure behind all Shopify stores and much of the modern web, run as smoothly and efficiently as possible.Īs part of the R&RI team, I got to meet skilled engineers that were doing open source work, directly contributing patches to CRuby itself. Back in July 2020, I joined the Ruby & Rails Infrastructure (R&RI) team at Shopify.
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