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