In fact, Ruby is not performant enough for Shopify, Github, and [<large_company>, ...]. It's very misleading for large companies to say "Ruby on Rails is perfo

In fact, Ruby is not performant enough for Shopify, Github, and [<large_company>, ...]. It's very misleading for large companies to say "Ruby on Rails is performant enough", as they rely on other languages for their performance critical workflows. I remember sometime ago on HN a GitLab developer repeating the same sentence. Actually, GitLab does use Golang for some microservices. It's wonderful that a combination of Ruby and <performant_language> is easy to develop/maintain and fast at the same time, however, the distinction with a pure Ruby system is not a trivial semantic matter, as it perpetuates the wrong and misleading idea that pure Ruby is fast enough to develop a complex system.