[tyingq]

Github does make it work, but you can see there's a tradeoff for that. Like in this blog post:

https://github.blog/2020-08-25-upgrading-github-to-ruby-2-7/

You see mentions of 70 second application boot times. Also interesting is the reference that a future upgrade to Ruby 3.x might increase performance by a factor of 3. That would mean they are leaving quite a lot on the table right now.

Basically, yes, they make it scale, but that's not free.

[kevinmchugh]

Ruby 3 being 3x faster is based on a video game emulation benchmark. Rails sites won't see anything like that. The ruby team chose a really specific benchmark to target and it's frustrating that it's not communicated well, leading to understandable misunderstandings.

[tyingq]

Somewhat interesting then, that Github cites the 3x without that context.