在 Hacker News 首頁上看到的消息，由 Shopify 贊助的 YJIT 被 Ruby 官方接受了：「Merge YJIT: an in-process JIT compiler (github.com/ruby)」。
YJIT currently provides average speedups of 23% over the CRuby interpreter on realistic benchmarks, and near-instant warm-up time.
實做 YJIT 的 Maxime Chevalier-Boisvert 在他自己的 blog 上有提到這次的實做：「YJIT: Building a New JIT Compiler Inside CRuby」，裡面選擇的方法是他的 PhD 論文：「Simple and Effective Type Check Removal through Lazy Basic Block Versioning」。
可以看到在六月寫文章的時候，改善其實還沒這麼大，而且作者提到有不少可以再提昇的空間：
That being said, according to our benchmarks, we’ve been able to achieve speedups over the CRuby interpreter of 7% on railsbench, 19% on liquid template rendering, and 19% on activerecord.
Currently, only about 50% of instructions in railsbench are executed by YJIT, and the rest run in the interpreter, meaning that there is still a lot we can do to improve upon our current results.
本來的 MJIT 看起來會慢慢淡出...
Mentions