title: Machine learning development environment
body: <p>I use python for doing prototypes in machine learning but have often been frustrated with the slow interpreter. Is there a language which is good for prototype (enough libraries like sklearn, numpy, scipy) but at the same time is fast and is a powerful language. </p>
  
  <p>What I am looking for is something that I can prototype in and deploy in production as well. What do people commonly use ?</p>