Run results for: foreach for vs promise.all for big arrays

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Whale/3.25.232.19 Safari/537.36

Browser: Chrome 122

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

each

5K/s

all

4K/s

View exact numbers

Test name	Executions per second
✓ each	4,864 Ops/sec
all	3,502 Ops/sec

Script Preparation code:

const quantity = 1000;

const array = Array(quantity)
    .fill({
        teste: true
    })
    .map((value, index) => ({
        id: index + 1,
        ...value
    }));

async function all() {
    return Promise.all(
        array.map(async (ar) => {
            const value = ar.index * Math.ceil(Math.random, quantity);
            return {
                ...ar,
                value
            };
        })
    );
};

async function each() {
    return array.map((ar) => {
        const value = ar.index * Math.ceil(Math.random, quantity);
        return {
            ...ar,
            value
        };
    });
};

Tests:

all
all()
each
each()