Crystal is currently my go-to language when I want to try something out, like a new algorithm, data structure or problem, and I want to write it in Ruby and hav

Crystal is currently my go-to language when I want to try something out, like a new algorithm, data structure or problem, and I want to write it in Ruby and have the Ruby kind of fun doing it, but I also want it to be fast and consistent (like in Ruby you can do N-sized input and in Crystal you can do N*10). I don't use it for work because I work for a Rails shop and we're currently happy with Rails.