| 1 | import { bench, group, run } from 'tatami-ng' |
| 2 | |
| 3 | import { sleep } from './benchmark-utils.mjs' |
| 4 | |
| 5 | const timeout = 2000 |
| 6 | const interval = 1000 |
| 7 | |
| 8 | /** |
| 9 | * @param timeoutMs |
| 10 | */ |
| 11 | function dummyTimeoutBusyWait (timeoutMs) { |
| 12 | const timeoutTimestampMs = performance.now() + timeoutMs |
| 13 | // eslint-disable-next-line no-empty |
| 14 | do {} while (performance.now() < timeoutTimestampMs) |
| 15 | } |
| 16 | |
| 17 | /** |
| 18 | * @param timeoutMs |
| 19 | * @param intervalMs |
| 20 | */ |
| 21 | async function sleepTimeoutBusyWait (timeoutMs, intervalMs = interval) { |
| 22 | const timeoutTimestampMs = performance.now() + timeoutMs |
| 23 | do { |
| 24 | await sleep(intervalMs) |
| 25 | } while (performance.now() < timeoutTimestampMs) |
| 26 | } |
| 27 | |
| 28 | /** |
| 29 | * @param timeoutMs |
| 30 | * @param intervalMs |
| 31 | */ |
| 32 | async function divideAndConquerTimeoutBusyWait ( |
| 33 | timeoutMs, |
| 34 | intervalMs = interval |
| 35 | ) { |
| 36 | const tries = Math.round(timeoutMs / intervalMs) |
| 37 | let count = 0 |
| 38 | do { |
| 39 | count++ |
| 40 | await sleep(intervalMs) |
| 41 | } while (count <= tries) |
| 42 | } |
| 43 | |
| 44 | /** |
| 45 | * @param timeoutMs |
| 46 | * @param intervalMs |
| 47 | */ |
| 48 | async function setIntervalTimeoutBusyWait (timeoutMs, intervalMs = interval) { |
| 49 | await new Promise(resolve => { |
| 50 | const tries = Math.round(timeoutMs / intervalMs) |
| 51 | let count = 0 |
| 52 | const triesSetInterval = setInterval(() => { |
| 53 | count++ |
| 54 | if (count === tries) { |
| 55 | clearInterval(triesSetInterval) |
| 56 | resolve() |
| 57 | } |
| 58 | }, intervalMs) |
| 59 | }) |
| 60 | } |
| 61 | |
| 62 | group('Busy wait', () => { |
| 63 | bench('dummyTimeoutBusyWait', () => { |
| 64 | dummyTimeoutBusyWait(timeout) |
| 65 | }) |
| 66 | bench('sleepTimeoutBusyWait', async () => { |
| 67 | await sleepTimeoutBusyWait(timeout) |
| 68 | }) |
| 69 | bench('divideAndConquerTimeoutBusyWait', async () => { |
| 70 | await divideAndConquerTimeoutBusyWait(timeout) |
| 71 | }) |
| 72 | bench('setIntervalTimeoutBusyWait', async () => { |
| 73 | await setIntervalTimeoutBusyWait(timeout) |
| 74 | }) |
| 75 | }) |
| 76 | |
| 77 | await run({ |
| 78 | units: true, |
| 79 | }) |