Benchmark: UUID Generation 2

HTML Preparation code:

<script src="https://unpkg.com/uuid@latest/dist/umd/uuidv4.min.js"></script>

Script Preparation code:

function uuidByBlob() {
  var url = URL.createObjectURL(new Blob());
  var uuid = url.toString();
  URL.revokeObjectURL(url);
  return uuid.substr(uuid.lastIndexOf('/') + 1);
}

// 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();
URL.createObjectURL
uuidByBlob()
NPM uuid
uuidv4()

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)
URL.createObjectURL
NPM uuid

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

Related benchmarks:

UUID Generation 2 (version: 0)

Compare NPM module uuid and URL.createObjectURL.

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) vs URL.createObjectURL vs NPM uuid

Created: 5 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)

URL.createObjectURL

NPM uuid

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):