How Fast Is Ruby 3 on Rails?

If you've been following me awhile, you know that I was hired by AppFolio years ago to measure Ruby 3's performance, especially on Rails. This has been a long trip. And that very first project is finally over: Ruby 3 exists and I can check its final, released Rails performance.If you have been following along, the numbers in this post won't surprise you. But it's important to do the final measurement. If you haven't been following, this will bring you up to date.What Am I Measuring?In concept, I'm measuring "how fast is Ruby 3 versus Ruby 2.6 or 2.7 for a typical real-world Rails workload?""Typical real-world workload" is a vague, hand-wavy concept. But there are a lot of specifics that can back it up. I used Rails Ruby Bench, something I've written for this purpose and used for years now.