Run results for: async for vs promise.all vs for await

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36

Browser: Chrome 138

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

async For

4.2M/s

For await

2.9M/s

PromiseAll

1.5M/s

View exact numbers

Test name	Executions per second
✓ async For	4,187,243 Ops/sec
For await	2,881,119 Ops/sec
PromiseAll	1,460,868 Ops/sec

Script Preparation code:

async function asyncFor(){
    for (const x of [1, 2, 3]) {
        await new Promise(resolve => resolve(x > 0));
    }
}

async function promiseAll() {
    await Promise.all([1, 2, 3].map(x =>
        new Promise(resolve => resolve(x > 0))
    ));
}

async function forAwait(){
    for await (const x of [1, 2, 3]) {
        await new Promise(resolve => resolve(x > 0));
    }
}

Tests:

async For
asyncFor()
PromiseAll
promiseAll()
For await
forAwait()