gistfile1.txt

msgpack = require("msgpack");

randomDouble = function(){
  return 0xFFFFFFFFFFFF * Math.random() / 0xFFFF;
}

randomByte = function(){
  return parseInt(0xFF * Math.random());
}

randomPacket = function(){
  switch(parseInt(Math.random() * 0xFF % 10)){
    case 0:
      // connect packet
      return [0x01, randomByte()]
      break;
    case 3:
      // disconnect packet
      return [0x03, randomByte()]
      break;
    default:
      // x,y,z position packet
      return [0x02, randomByte(), randomDouble(), randomDouble(), randomDouble()]
      break;
  }
}

jsonTest = function(array){
  var r = JSON.stringify(array);
  return JSON.parse(r) && r.length;
}

msgpackTest = function(array){
  var r = msgpack.pack(array);
  return msgpack.unpack(r) && r.length;
}

customTest = function(array){
  var packetSize = 1 * 2 + 8 * 3,
    buffer = new ArrayBuffer((array.length + 1) * packetSize),
    view = new DataView(buffer),
    offset = 0,
    x;

  for(x=0;x<array.length;x++){
    view.setUint8(offset += 1, array[x][0]);
    view.setUint8(offset += 1, array[x][1]);

    if(array[x][0]==0x02){
      view.setFloat64(offset += 8, array[x][2]);
      view.setFloat64(offset += 8, array[x][3]);
      view.setFloat64(offset += 8, array[x][4]);
    }
  }

  offset = 0;

  for(x=0;x<array.length;x++){
    result = [
      view.getUint8(offset += 1, true),
      view.getUint8(offset += 1, true)
    ]

    if(result[0]==0x02){
      result.concat([
        view.getFloat64(offset += 8, true),
        view.getFloat64(offset += 8, true),
        view.getFloat64(offset += 8, true)
      ]);
    }
  }

  // parse..

  return offset;
}

var ITER = 10 * 10,
  array = [],
  x = 0;

for(x=0;x<5000;x++){
  array.push(randomPacket());
}

var t = process.hrtime(),
  iterations = ITER,
  length = 0;

console.log("Json...");

for(i=0;i<iterations;i++){
  length += jsonTest(array);
}

t2 = process.hrtime(t);
console.log('  * benchmark took %d seconds and %d ms', t2[0], parseInt(t2[1] / 1000000));
console.log('  * average size of packet stream is %d', parseInt(length / iterations));

var t = process.hrtime(),
  iterations = ITER,
  length = 0;

console.log("Msgpack...");

for(i=0;i<iterations;i++){
  length += msgpackTest(array);
}

t2 = process.hrtime(t);
console.log('  * benchmark took %d seconds and %d ms', t2[0], parseInt(t2[1] / 1000000));
console.log('  * average size of packet stream is %d', parseInt(length / iterations));

var t = process.hrtime(),
  iterations = ITER,
  length = 0;

console.log("Custom...");

for(i=0;i<iterations;i++){
  length += customTest(array);
}

t2 = process.hrtime(t);
console.log('  * benchmark took %d seconds and %d ms', t2[0], parseInt(t2[1] / 1000000));
console.log('  * average size of packet stream is %d', parseInt(length / iterations));