He did everything right. Tried it in ruby, if it would have been fast enough this article wouldn't exist. Instead he applied good software engineering and found

He did everything right. Tried it in ruby, if it would have been fast enough this article wouldn't exist. Instead he applied good software engineering and found the right tool for the job. This doesnt say "don't use ruby it's too slow". It's says prototype in your comfort zone and optimize. Isn't this what we all agree on? Edit: auto correct fail.