| 1 | import Benchmark from 'benchmark' |
| 2 | |
| 3 | import { LIST_FORMATTER } from '../benchmarks-utils.cjs' |
| 4 | |
| 5 | function generateWorkersArray (numberOfWorkers) { |
| 6 | return [...Array(numberOfWorkers).keys()] |
| 7 | } |
| 8 | |
| 9 | const workers = generateWorkersArray(60) |
| 10 | |
| 11 | let nextWorkerIndex |
| 12 | |
| 13 | function roundRobinTernaryOffByOne () { |
| 14 | nextWorkerIndex = |
| 15 | workers.length - 1 === nextWorkerIndex ? 0 : nextWorkerIndex + 1 |
| 16 | return workers[nextWorkerIndex] |
| 17 | } |
| 18 | |
| 19 | function roundRobinTernaryWithNegation () { |
| 20 | nextWorkerIndex = |
| 21 | !nextWorkerIndex || workers.length - 1 === nextWorkerIndex |
| 22 | ? 0 |
| 23 | : nextWorkerIndex + 1 |
| 24 | return workers[nextWorkerIndex] |
| 25 | } |
| 26 | |
| 27 | function roundRobinTernaryWithPreChoosing () { |
| 28 | const chosenWorker = workers[nextWorkerIndex] |
| 29 | nextWorkerIndex = |
| 30 | workers.length - 1 === nextWorkerIndex ? 0 : nextWorkerIndex + 1 |
| 31 | return chosenWorker |
| 32 | } |
| 33 | |
| 34 | function roundRobinIncrementModulo () { |
| 35 | const chosenWorker = workers[nextWorkerIndex] |
| 36 | nextWorkerIndex++ |
| 37 | nextWorkerIndex %= workers.length |
| 38 | return chosenWorker |
| 39 | } |
| 40 | |
| 41 | new Benchmark.Suite('Round robin tasks distribution') |
| 42 | .add('Ternary off by one', () => { |
| 43 | nextWorkerIndex = 0 |
| 44 | roundRobinTernaryOffByOne() |
| 45 | }) |
| 46 | .add('Ternary with negation', () => { |
| 47 | nextWorkerIndex = 0 |
| 48 | roundRobinTernaryWithNegation() |
| 49 | }) |
| 50 | .add('Ternary with pre-choosing', () => { |
| 51 | nextWorkerIndex = 0 |
| 52 | roundRobinTernaryWithPreChoosing() |
| 53 | }) |
| 54 | .add('Increment+Modulo', () => { |
| 55 | nextWorkerIndex = 0 |
| 56 | roundRobinIncrementModulo() |
| 57 | }) |
| 58 | .on('cycle', event => { |
| 59 | console.info(event.target.toString()) |
| 60 | }) |
| 61 | .on('complete', function () { |
| 62 | console.info( |
| 63 | 'Fastest is ' + LIST_FORMATTER.format(this.filter('fastest').map('name')) |
| 64 | ) |
| 65 | }) |
| 66 | .run() |