Benchmark: UUID Generation - MeasureThat.net

Script Preparation code:


// Jeff Ward v7
var lut = []; for (var i=0; i<256; i++) { lut[i] = (i<16?'0':'')+(i).toString(16); }
function e7()
{
  var d0 = Math.random()*0xffffffff|0;
  var d1 = Math.random()*0xffffffff|0;
  var d2 = Math.random()*0xffffffff|0;
  var d3 = Math.random()*0xffffffff|0;
  return lut[d0&0xff]+lut[d0>>8&0xff]+lut[d0>>16&0xff]+lut[d0>>24&0xff]+'-'+
    lut[d1&0xff]+lut[d1>>8&0xff]+'-'+lut[d1>>16&0x0f|0x40]+lut[d1>>24&0xff]+'-'+
    lut[d2&0x3f|0x80]+lut[d2>>8&0xff]+'-'+lut[d2>>16&0xff]+lut[d2>>24&0xff]+
    lut[d3&0xff]+lut[d3>>8&0xff]+lut[d3>>16&0xff]+lut[d3>>24&0xff];
}

// Jeff Ward v7 window.crypto
var lut = []; for (var i=0; i<256; i++) { lut[i] = (i<16?'0':'')+(i).toString(16); }
function e7_crypto()
{
  var d = new Uint32Array(4);
  window.crypto.getRandomValues(d);
  return lut[d[0]&0xff]+lut[d[0]>>8&0xff]+lut[d[0]>>16&0xff]+lut[d[0]>>24&0xff]+'-'+
    lut[d[1]&0xff]+lut[d[1]>>8&0xff]+'-'+lut[d[1]>>16&0x0f|0x40]+lut[d[1]>>24&0xff]+'-'+
    lut[d[2]&0x3f|0x80]+lut[d[2]>>8&0xff]+'-'+lut[d[2]>>16&0xff]+lut[d[2]>>24&0xff]+
    lut[d[3]&0xff]+lut[d[3]>>8&0xff]+lut[d[3]>>16&0xff]+lut[d[3]>>24&0xff];
}


// Broofa (new)
function uuidv4_new() {
  return ([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g, c =>
    (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16)
  )
}

// Broofa (old)
function uuidv4_old() {
  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
    var r = Math.random() * 16 | 0, v = c == 'x' ? r : (r & 0x3 | 0x8);
    return v.toString(16);
  });
}


// Jon Surrell (not real UUID)
function guid() {
  function s4() {
    return Math.floor((1 + Math.random()) * 0x10000)
      .toString(16)
      .substring(1);
  }
  return s4() + s4() + '-' + s4() + '-' + s4() + '-' +
    s4() + '-' + s4() + s4() + s4();
}

// My Test
var UUID = (new function() {
  this._lut = []; for (var i = 0; i < 256; i++) {
    this._lut[i] = (i < 16 ? '0' : '') + (i).toString(16);
  };

  this._format = function (rarr) {
    return '' +
    this._lut[rarr[0]       & 0xff]        + this._lut[rarr[0] >>  8 & 0xff] + this._lut[rarr[0] >> 16 & 0xff] + this._lut[rarr[0] >> 24 & 0xff] + '-' +
    this._lut[rarr[1]       & 0xff]        + this._lut[rarr[1] >>  8 & 0xff] + '-' +
    this._lut[rarr[1] >> 16 & 0x0f | 0x40] + this._lut[rarr[1] >> 24 & 0xff] + '-' +
    this._lut[rarr[2]       & 0x3f | 0x80] + this._lut[rarr[2] >>  8 & 0xff] + '-' +
    this._lut[rarr[2] >> 16 & 0xff]        + this._lut[rarr[2] >> 24 & 0xff] +
    this._lut[rarr[3]       & 0xff]        + this._lut[rarr[3] >>  8 & 0xff] +
    this._lut[rarr[3] >> 16 & 0xff]        + this._lut[rarr[3] >> 24 & 0xff];
  };

  this._getRandomness = function () {
    if ('crypto' in window && 'Uint32Array' in window) {
      var dvals = new Uint32Array(4);
      window.crypto.getRandomValues(dvals);
      return dvals
    }
    return [
      Math.random() * 0x100000000 >>> 0,
      Math.random() * 0x100000000 >>> 0,
      Math.random() * 0x100000000 >>> 0,
      Math.random() * 0x100000000 >>> 0,
    ];
  };

  this.generate = function () {
    return this._format(this._getRandomness());
  };
}());

var UUID2 = (new function () {
  this._lut = []; for (var i = 0; i < 256; i++) {
    this._lut[i] = (i < 16 ? '0' : '') + (i).toString(16);
  };

  this._format = function (rarr) {
    return [
      this._lut[rarr[0]       & 0xff]        , this._lut[rarr[0] >>  8 & 0xff] , this._lut[rarr[0] >> 16 & 0xff] , this._lut[rarr[0] >> 24 & 0xff] , '-' ,
      this._lut[rarr[1]       & 0xff]        , this._lut[rarr[1] >>  8 & 0xff] , '-' ,
      this._lut[rarr[1] >> 16 & 0x0f | 0x40] , this._lut[rarr[1] >> 24 & 0xff] , '-' ,
      this._lut[rarr[2]       & 0x3f | 0x80] , this._lut[rarr[2] >>  8 & 0xff] , '-' ,
      this._lut[rarr[2] >> 16 & 0xff]        , this._lut[rarr[2] >> 24 & 0xff] ,
      this._lut[rarr[3]       & 0xff]        , this._lut[rarr[3] >>  8 & 0xff] ,
      this._lut[rarr[3] >> 16 & 0xff]        , this._lut[rarr[3] >> 24 & 0xff]
    ].join('')
  };

  this._getRandomness = function () {
    if ('crypto' in window && 'Uint32Array' in window) {
      var dvals = new Uint32Array(4);
      window.crypto.getRandomValues(dvals);
      return dvals
    }
    return [
      Math.random() * 0x100000000 >>> 0,
      Math.random() * 0x100000000 >>> 0,
      Math.random() * 0x100000000 >>> 0,
      Math.random() * 0x100000000 >>> 0,
    ];
  };

  this.generate = function () {
    return this._format(this._getRandomness());
  };
}());

Tests:

Jeff Ward v7
e7();
Jon Surrell (not real UUID)
guid();
Broofa (new)
uuidv4_new();
Broofa (old)
uuidv4_old();
My Test
UUID.generate();
Jeff Ward v7 window.crypto
e7_crypto();
My Test v2 (array.join)
UUID2.generate();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Jeff Ward v7
Jon Surrell (not real UUID)
Broofa (new)
Broofa (old)
My Test
Jeff Ward v7 window.crypto
My Test v2 (array.join)

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/112.0

Browser/OS: Firefox 112 on Ubuntu

View result in a separate tab

Test name	Executions per second
Jeff Ward v7	5307092.0 Ops/sec
Jon Surrell (not real UUID)	3778560.0 Ops/sec
Broofa (new)	46052.8 Ops/sec
Broofa (old)	551484.0 Ops/sec
My Test	687829.4 Ops/sec
Jeff Ward v7 window.crypto	957315.1 Ops/sec
My Test v2 (array.join)	598290.3 Ops/sec

UUID Generation (version: 5)

Comparing performance of: Jeff Ward v7 vs Jon Surrell (not real UUID) vs Broofa (new) vs Broofa (old) vs My Test vs Jeff Ward v7 window.crypto vs My Test v2 (array.join)

Created: 6 years ago by: Registered User

Jump to the latest result

Jeff Ward v7

Jon Surrell (not real UUID)

Broofa (new)

Broofa (old)

My Test

Jeff Ward v7 window.crypto

My Test v2 (array.join)

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A