bench-pbkdf2-md5.js

var lib = process.argv[2] || 'node'
var alg = 'sha512'
var length = 32
var libs = {
  node: function (alg) {
    var crypto = require('crypto')
    return function (key, salt, iterations, length) {
      return crypto.pbkdf2Sync(key, salt, iterations, length, 'sha512')
    }
  },

  md5: function (alg) {
    var crypto = require('crypto')
    return function (key, salt, iterations, length) {
      return crypto.createHash('md5').update(key).digest('hex');
    }
  },
}

console.log('iterations (N), time (ms), iterations/ms (ops/ms), hash')

var M = 10 * 1000
var prev = 0
var pbk = libs[lib](alg)

;(function loop (i) {
  if (i > 80) return
  var n = Math.pow(M, i / 80) | 0
  if (n === prev) return loop(i + 1)
  prev = n
  var start = Date.now()
  var end
  var j = 0
  do {
    var _hash = pbk('whatever', 'salty', n, length)
    end = Date.now()
    j++
  } while (end - start < 100)
  var time = end - start

  // if the first argument is a string,
  // console.log doesn't quote things
  //console.log(['' + n, time / j, (n * j) / time, _hash].join(', '))
  console.log(['' + n, time / j, (n * j) / time].join(', '))
  setTimeout(loop, 10, i + 1)
})(0)