Also, another thing to notice is they are using HTTP/2, which is not supported by Rack at the moment, not sure if they got a secret way to get around it
Hey, no secret needed, AFAIK they use some flavour of nginx as a reverse proxy in front of puma servers. And nginx handles http/2 well.
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.