YJIT: Revolutionizing Ruby Performance

This chapter explores YJIT, a just-in-time compilation technique for Ruby, highlighting its development at Shopify and the challenges faced with existing implementations. It discusses the transition from C to Rust for better compatibility and performance, alongside the complexities of integrating YJIT into CRuby. The conversation also contrasts YJIT with other Ruby JIT projects, emphasizing benchmarks, community acceptance, and practical deployment concerns.