benchmark-utils.js

   1 const crypto = require('crypto')
   2
   3 /**
   4  * Generate a cryptographically secure random number in the [0,1[ range
   5  *
   6  * @returns
   7  */
   8 function secureRandom () {
   9   return crypto.randomBytes(4).readUInt32LE() / 0x100000000
  10 }
  11
  12 /**
  13  * @param max
  14  * @param min
  15  * @returns
  16  */
  17 function generateRandomInteger (max, min = 0) {
  18   if (max < 0) {
  19     throw new RangeError('Invalid interval')
  20   }
  21   max = Math.floor(max)
  22   if (min) {
  23     if (max < min || min < 0) {
  24       throw new RangeError('Invalid interval')
  25     }
  26     min = Math.ceil(min)
  27     return Math.floor(secureRandom() * (max - min + 1)) + min
  28   }
  29   return Math.floor(secureRandom() * (max + 1))
  30 }
  31
  32 /**
  33  *
  34  * @param size
  35  * @param max
  36  */
  37 function generateRandomIntegerArray (size, max = Number.MAX_SAFE_INTEGER) {
  38   const integerArray = []
  39   for (let i = 0; i < size; i++) {
  40     integerArray.push(generateRandomInteger(max))
  41   }
  42   return integerArray
  43 }
  44
  45 /**
  46  * @param ms
  47  * @returns
  48  */
  49 async function sleep (ms) {
  50   return new Promise(resolve => setTimeout(resolve, ms))
  51 }
  52
  53 const LIST_FORMATTER = new Intl.ListFormat('en-US', {
  54   style: 'long',
  55   type: 'conjunction'
  56 })
  57
  58 module.exports = {
  59   generateRandomInteger,
  60   generateRandomIntegerArray,
  61   sleep,
  62   secureRandom,
  63   LIST_FORMATTER
  64 }