Unlocking Performance: Installing Ruby with YJIT on MacOS - DEV Community

YJIT, the groundbreaking Just-In-Time compiler for Ruby, brings a significant performance boost to your applications. However, it's important to note that YJIT isn't enabled by default in ruby. Fear not, though – with a few straightforward steps, you can harness the power of YJIT on your MacOS system.To begin, it's essential to rebuild Ruby with the proper configuration option. This involves using the --enable-yjit flag 1. Additionally, make sure you have rustc installed, as YJIT relies on it.