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Native Promises vs Generators vs Async/Await Performance vs Bluebird Promises
const Benchmark = require('benchmark')
const co = require('co')
const bluebird = require('bluebird')
const suite = new Benchmark.Suite
suite
.add('co generators', {
defer: true,
fn: deferred => {
co(function*() {
yield Promise.resolve(1)
yield Promise.resolve(2)
deferred.resolve()
})
}
})
.add('async/await', {
defer: true,
fn: deferred => {
(async () => {
await Promise.resolve(1)
await Promise.resolve(2)
deferred.resolve()
})()
}
})
.add('native promises', {
defer: true,
fn: deferred => {
Promise.resolve(1)
.then(() => Promise.resolve(2))
.then(() => deferred.resolve())
}
})
.add('bluebird promises', {
defer: true,
fn: deferred => {
bluebird.resolve(1)
.then(() => bluebird.resolve(2))
.then(() => deferred.resolve())
}
})
.on('cycle', event => {
const r = event.target
dd(r)
})
.on('complete', () => {
dd('Fastest is ' + suite.filter('fastest').map('name'))
})
.run({
'async': false
})
function dd(obj) {
console.dir(obj, {colors: true})
}
co generators x 186,551 ops/sec ±1.20% (76 runs sampled)
async/await x 431,637 ops/sec ±0.93% (82 runs sampled)
native promises x 1,383,370 ops/sec ±0.50% (85 runs sampled)
bluebird promises x 1,896,068 ops/sec ±1.99% (80 runs sampled)
Fastest is bluebird promises
@intech
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intech commented Apr 26, 2021

node v13.14.0

co generators x 328,340 ops/sec ±0.63% (84 runs sampled)
async/await x 3,504,078 ops/sec ±0.68% (84 runs sampled)
native promises x 3,590,390 ops/sec ±0.45% (87 runs sampled)
bluebird promises x 1,840,102 ops/sec ±1.12% (86 runs sampled)
Fastest is native promises
node v14.16.1

co generators x 341,121 ops/sec ±1.11% (82 runs sampled)
async/await x 3,418,420 ops/sec ±0.74% (84 runs sampled)
native promises x 2,605,891 ops/sec ±2.24% (79 runs sampled)
bluebird promises x 1,559,188 ops/sec ±2.71% (85 runs sampled)
Fastest is async/await
node v15.14.0

co generators x 320,900 ops/sec ±1.58% (79 runs sampled)
async/await x 3,384,254 ops/sec ±0.99% (86 runs sampled)
native promises x 3,005,298 ops/sec ±1.28% (86 runs sampled)
bluebird promises x 1,672,506 ops/sec ±0.29% (87 runs sampled)
Fastest is async/await
node v16.0.0

co generators x 329,304 ops/sec ±1.97% (84 runs sampled)
async/await x 3,306,700 ops/sec ±1.20% (87 runs sampled)
native promises x 3,077,731 ops/sec ±0.64% (86 runs sampled)
bluebird promises x 1,559,288 ops/sec ±0.47% (87 runs sampled)
Fastest is async/await

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