random.mjs

   1 import { randomInt } from 'node:crypto'
   2
   3 import Benchmark from 'benny'
   4
   5 import {
   6   secureRandom,
   7   secureRandomWithRandomValues
   8 } from './benchmark-utils.mjs'
   9
  10 const maximum = 281474976710654
  11
  12 /**
  13  * @param max
  14  * @param min
  15  * @returns
  16  */
  17 function getSecureRandomInteger (max = Number.MAX_SAFE_INTEGER, min = 0) {
  18   if (max < min || max < 0 || min < 0) {
  19     throw new RangeError('Invalid interval')
  20   }
  21   max = Math.floor(max)
  22   if (min !== 0) {
  23     min = Math.ceil(min)
  24     return Math.floor(secureRandom() * (max - min + 1)) + min
  25   }
  26   return Math.floor(secureRandom() * (max + 1))
  27 }
  28
  29 /**
  30  * @param max
  31  * @param min
  32  * @returns
  33  */
  34 function getSecureRandomIntegerWithRandomValues (
  35   max = Number.MAX_SAFE_INTEGER,
  36   min = 0
  37 ) {
  38   if (max < min || max < 0 || min < 0) {
  39     throw new RangeError('Invalid interval')
  40   }
  41   max = Math.floor(max)
  42   if (min !== 0) {
  43     min = Math.ceil(min)
  44     return Math.floor(secureRandomWithRandomValues() * (max - min + 1)) + min
  45   }
  46   return Math.floor(secureRandomWithRandomValues() * (max + 1))
  47 }
  48
  49 /**
  50  * @param max
  51  * @param min
  52  * @returns
  53  */
  54 function getRandomInteger (max = Number.MAX_SAFE_INTEGER, min = 0) {
  55   if (max < min || max < 0 || min < 0) {
  56     throw new RangeError('Invalid interval')
  57   }
  58   max = Math.floor(max)
  59   if (min !== 0) {
  60     min = Math.ceil(min)
  61     return Math.floor(Math.random() * (max - min + 1)) + min
  62   }
  63   return Math.floor(Math.random() * (max + 1))
  64 }
  65
  66 Benchmark.suite(
  67   'Random Integer Generator',
  68   Benchmark.add('Secure random integer generator', () => {
  69     getSecureRandomInteger(maximum)
  70   }),
  71   Benchmark.add(
  72     'Secure random with getRandomValues() integer generator',
  73     () => {
  74       getSecureRandomIntegerWithRandomValues(maximum)
  75     }
  76   ),
  77   Benchmark.add('Crypto random integer generator', (max = maximum, min = 0) => {
  78     max = Math.floor(max)
  79     if (min !== 0) {
  80       min = Math.ceil(min)
  81       return Math.floor(randomInt(min, max + 1))
  82     }
  83     return Math.floor(randomInt(max + 1))
  84   }),
  85   Benchmark.add('Math random integer generator', () => {
  86     getRandomInteger(maximum)
  87   }),
  88   Benchmark.cycle(),
  89   Benchmark.complete(),
  90   Benchmark.save({
  91     file: 'random-integer-generator',
  92     format: 'json',
  93     details: true
  94   }),
  95   Benchmark.save({
  96     file: 'random-integer-generator',
  97     format: 'chart.html',
  98     details: true
  99   }),
 100   Benchmark.save({
 101     file: 'random-integer-generator',
 102     format: 'table.html',
 103     details: true
 104   })
 105 ).catch(console.error)