OPTIMIZING RUBY PERFORMANCE: OBSERVATIONS FROM THOUSANDS OF REAL-WORLD SERVICES

Summary from the TLDR Dev newsletter

Based on analysis of over 3,000 real-world Ruby services, Datadog found that Ruby applications spend 82% of their CPU time in library code, making careful library selection necessary for performance optimization. Upgrading from Ruby 2 to Ruby 3 (with YJIT enabled) reduces CPU usage, while some popular libraries like mysql2 can be replaced with more efficient alternatives like trilogy for performance gains.