Takashi Kokubun is a staff developer at Shopify.

He has been working with Ruby’s MJIT compiler for over 5 years but has been recently maintaining YJIT as well. JIT compilation is a method of running computer code that involves compilation after a program has begun running rather than before. He joins the show to talk about these topics alongside Chuck and Valentino. He also explains their importance as this contributes to running Ruby applications smoothly. He also shares his experience working with rust and creating HAML 6.0.0.