random.js

   1 const Benchmark = require('benny')
   2 const { secureRandom } = require('./benchmark-utils')
   3
   4 const maximum = Number.MAX_SAFE_INTEGER
   5
   6 /**
   7  * @param max
   8  * @param min
   9  * @returns
  10  */
  11 function getSecureRandomInteger (max = Number.MAX_SAFE_INTEGER, min = 0) {
  12   if (max < min || max < 0 || min < 0) {
  13     throw new RangeError('Invalid interval')
  14   }
  15   max = Math.floor(max)
  16   if (min != null && min !== 0) {
  17     min = Math.ceil(min)
  18     return Math.floor(secureRandom() * (max - min + 1)) + min
  19   }
  20   return Math.floor(secureRandom() * (max + 1))
  21 }
  22
  23 /**
  24  * @param max
  25  * @param min
  26  * @returns
  27  */
  28 function getRandomInteger (max = Number.MAX_SAFE_INTEGER, min = 0) {
  29   if (max < min || max < 0 || min < 0) {
  30     throw new RangeError('Invalid interval')
  31   }
  32   max = Math.floor(max)
  33   if (min != null && min !== 0) {
  34     min = Math.ceil(min)
  35     return Math.floor(Math.random() * (max - min + 1)) + min
  36   }
  37   return Math.floor(Math.random() * (max + 1))
  38 }
  39
  40 Benchmark.suite(
  41   'Random Integer Generator',
  42   Benchmark.add('Secure random integer generator', () => {
  43     getSecureRandomInteger(maximum)
  44   }),
  45   Benchmark.add('Random integer generator', () => {
  46     getRandomInteger(maximum)
  47   }),
  48   Benchmark.cycle(),
  49   Benchmark.complete(),
  50   Benchmark.save({
  51     file: 'random-integer-generator',
  52     format: 'json',
  53     details: true
  54   }),
  55   Benchmark.save({
  56     file: 'random-integer-generator',
  57     format: 'chart.html',
  58     details: true
  59   }),
  60   Benchmark.save({
  61     file: 'random-integer-generator',
  62     format: 'table.html',
  63     details: true
  64   })
  65 )