code: function request(socket, start) {
  
      var diff = process.hrtime(start);
      var nanoseconds = diff[0] * 1e9 + diff[1];
      var bytes = socket.bytesRead - ~~socket.transferRateBytesRead;
      var data = (bytes * __byte) / __denominator;
  
      socket.transferRateBytesRead = socket.bytesRead; // keep-alive socket
      return (data / (nanoseconds / __time)).toFixed(2) + __out;
    }
docs: request
  
  @function wrapper
  @param {Object} socket - client socket
  @param {Array} start - start time
  @return {String}