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  */
  16 function generateRandomInteger (max, min = 0) {
  17   if (max < 0) {
  18     throw new RangeError('Invalid interval')
  19   }
  20   max = Math.floor(max)
  21   if (min) {
  22     if (max < min || min < 0) {
  23       throw new RangeError('Invalid interval')
  24     }
  25     min = Math.ceil(min)
  26     return Math.floor(secureRandom() * (max - min + 1)) + min
  27   }
  28   return Math.floor(secureRandom() * (max + 1))
  29 }
  30
  31 /**
  32  * @param ms
  33  */
  34 async function sleep (ms) {
  35   return new Promise(resolve => setTimeout(resolve, ms))
  36 }
  37
  38 const LIST_FORMATTER = new Intl.ListFormat('en-US', {
  39   style: 'long',
  40   type: 'conjunction'
  41 })
  42
  43 module.exports = { generateRandomInteger, sleep, secureRandom, LIST_FORMATTER }