title: compact binary representation of json
body: <p>Are there any compact binary representations of JSON out there?  I know there is <a href="http://bsonspec.org" rel="noreferrer">BSON</a>, but even that webpage says "in many cases is not much more efficient than JSON. In some cases BSON uses even more space than JSON".</p>
  
  <p>I'm looking for a format that's as compact as possible, preferably some kind of open standard?</p>