code: function makeRequest(title, cacheHitExpected, next) {
    var start = Date.now();
  
    request({
      url: 'http://localhost:1337/',
      encoding: null
    }, function(err, data, body) {
      var time = Date.now() - start;
  
      var receivedImage = new Buffer(body, 'binary');
  
      console.log(title);
      console.log('  status:', data.statusCode);
      console.log('  sent image length:', IMAGE.length);
      console.log('  received image length  :', receivedImage.length);
      console.log('  time  :', time);
      
      common.verify(function() {
        common.shouldEquals(IMAGE, receivedImage);
      });
  
      console.log();
  
      next();
    });
  }
docs: -- HTTP REQUESTS ------------------------------------------------------------