random.mjs

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