binary buffer encoding perf test

gistfile1.txt

console.log( 'encode hex:    '+testN(encodeTest, getRandomBuffer, 'hex', 100000).toFixed(10) )
console.log( 'decode hex:    '+testN(decodeTest, getRandomData, 'hex', 100000).toFixed(10) )
console.log( '--------------' )
console.log( 'encode utf8:   '+testN(encodeTest, getRandomBuffer, 'utf8', 100000).toFixed(10) )
console.log( 'decode utf8:   '+testN(decodeTest, getRandomData, 'utf8', 100000).toFixed(10) )
console.log( '--------------' )
console.log( 'encode base64: '+testN(encodeTest, getRandomBuffer, 'base64', 100000).toFixed(10) )
console.log( 'decode base64: '+testN(decodeTest, getRandomData, 'base64', 100000).toFixed(10) )
console.log( '--------------' )
console.log( 'encode json:   '+testN(encodeJsonTest, getRandomBuffer, 'json', 100000).toFixed(10) )
console.log( 'decode json:   '+testN(decodeJsonTest, getRandomJson, 'json', 100000).toFixed(10) )


// var testData = getRandomBuffer(32)
// var encoded = encodeTest(testData, 'utf8')
// console.log('utf8:', Buffer(encoded).length)

// var testData = getRandomBuffer(32)
// var encoded = encodeTest(testData, 'base64')
// console.log('base64:', Buffer(encoded).length)

function testN(test, generateData, encoding, count){
  var testData = generateData(32, encoding)

  var start = process.hrtime()
  for (var i = 0; i<count; i++) {
    test(testData, encoding)
  }
  var duration = process.hrtime(start)

  var total = duration[0] + duration[1] * 1e-9
  var average = total / count
  return average
}


function encodeTest(testBuffer, encoding){
  var output = testBuffer.toString(encoding)
  return output
}

function decodeTest(testData, encoding){
  var output = Buffer(testData, encoding)
  return output
}

function getRandomBuffer (howMany) {
  var fs= require('fs');
  var bytes= new Buffer(howMany);
  var fd= fs.openSync('/dev/random', 'r');
  fs.readSync(fd, bytes, 0, howMany, null);
  fs.closeSync(fd)
  return bytes;
}

function getRandomData(howMany, encoding) {
  return getRandomBuffer(howMany).toString(encoding)
}

// special tests for json

function encodeJsonTest(testBuffer){
  var output = JSON.stringify(testBuffer)
  return output
}

function decodeJsonTest(testData){
  var output = JSON.parse(testData)
  return output
}

function getRandomJson(howMany) {
  return JSON.stringify(getRandomBuffer(howMany))
}