benchmarks/internal/choose-worker.js

   1 const Benchmark = require('benchmark')
   2 const { LIST_FORMATTER } = require('./benchmark-utils')
   3
   4 const suite = new Benchmark.Suite()
   5
   6 function generateWorkersArray (numberOfWorkers) {
   7   return [...Array(numberOfWorkers).keys()]
   8 }
   9
  10 const workers = generateWorkersArray(60)
  11
  12 let nextWorkerIndex
  13
  14 function chooseWorkerTernaryOffByOne () {
  15   nextWorkerIndex =
  16     workers.length - 1 === nextWorkerIndex ? 0 : nextWorkerIndex + 1
  17   return workers[nextWorkerIndex]
  18 }
  19
  20 function chooseWorkerTernaryWithNegation () {
  21   nextWorkerIndex =
  22     !nextWorkerIndex || workers.length - 1 === nextWorkerIndex
  23       ? 0
  24       : nextWorkerIndex + 1
  25   return workers[nextWorkerIndex]
  26 }
  27
  28 function chooseWorkerTernaryWithPreChoosing () {
  29   const chosenWorker = workers[nextWorkerIndex]
  30   nextWorkerIndex =
  31     workers.length - 1 === nextWorkerIndex ? 0 : nextWorkerIndex + 1
  32   return chosenWorker
  33 }
  34
  35 function chooseWorkerIncrementModulo () {
  36   const chosenWorker = workers[nextWorkerIndex]
  37   nextWorkerIndex++
  38   nextWorkerIndex %= workers.length
  39   return chosenWorker
  40 }
  41
  42 suite
  43   .add('Ternary off by one', function () {
  44     nextWorkerIndex = 0
  45     chooseWorkerTernaryOffByOne()
  46   })
  47   .add('Ternary with negation', function () {
  48     nextWorkerIndex = 0
  49     chooseWorkerTernaryWithNegation()
  50   })
  51   .add('Ternary with pre-choosing', function () {
  52     nextWorkerIndex = 0
  53     chooseWorkerTernaryWithPreChoosing()
  54   })
  55   .add('Increment+Modulo', function () {
  56     nextWorkerIndex = 0
  57     chooseWorkerIncrementModulo()
  58   })
  59   .on('cycle', function (event) {
  60     console.log(event.target.toString())
  61   })
  62   .on('complete', function () {
  63     console.log(
  64       'Fastest is ' + LIST_FORMATTER.format(this.filter('fastest').map('name'))
  65     )
  66     // eslint-disable-next-line no-process-exit
  67     process.exit()
  68   })
  69   .run()