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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36

Browser: Chrome 132

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

For await

1.3M/s

async For

642K/s

PromiseAll

480K/s

View exact numbers

Test name	Executions per second
✓ For await	1,251,479 Ops/sec
async For	642,410 Ops/sec
PromiseAll	480,386 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()