Precompiling Ruby scripts Myth & Fact Koichi Sasada ko1@heroku.com Questions Have you ever thought Ruby is slow? Quick answer •Try latest MRI contains optimized VM •Ruby 1.9 and later implement VMs •Ruby 2.3 (Dec/2015) also includes many improvements •VMs are written by Koichi Sasada Questions Have you ever thought Ruby’s GC is slow? Quick answer •Try Ruby 2.1 and later •Generational and increment