Video at https://youtu.be/0ykPiPAKZL8?t=16104 Code at https://github.com/eregon/rsb/tree/bench Presentation at RubyKaigi 2020 https://rubykaigi.org/2020-takeout/speakers#eregontp Optimizing Rack and Rails applications with a just-in-time (JIT) compiler is a challenge. For example, MJIT does not speed up Rails currently. TruffleRuby tackles this challenge. We have been running the Rails Simpler Ben