At least as of Ruby 2.6 I tried that and it really didn't work: http://engineering.appfolio.com/appfolio-engineering/2018/4/3/ruby-26-and-ahead-of-time-compilat

At least as of Ruby 2.6 I tried that and it really didn't work: http://engineering.appfolio.com/appfolio-engineering/2018/4/3/ruby-26-and-ahead-of-time-compilation http://engineering.appfolio.com/appfolio-engineering/2018/4/... It may work a bit better now, but it's still very much not tuned for that. The result would probably still be slower than not JITting, for the same reasons mentioned for 2.6 in that link.