Run results for: Promise vs Async Await(2)

Test name	Executions per second
✓ Promise Chain	204,986 Ops/sec
Async Await	197,922 Ops/sec
Promise Chain normal	29,457 Ops/sec
Promise.all	18,656 Ops/sec

Script Preparation code:

function executePromises() {
    const vals = [];
    Promise.resolve(1)
        .then((val) => {
            vals.push(val);
            return Promise.resolve(2);
        })
        .then((val) => {
            vals.push(val);
            return Promise.resolve(3);
        })
        .then((val) => {
            vals.push(val);
            return Promise.resolve(4);
        })
        .then((val) => {
            vals.push(val);
            return Promise.resolve(5);
        })
        .then((val) => {
            vals.push(val);
            return Promise.resolve(6);
        })
        .then((val) => {
            vals.push(val);
            console.log(vals);
        });
}

function executePromises2() {
    const vals = [];
    Promise.resolve(1)
        .then((val) => {
            vals.push(val);
            return 2;
        })
        .then((val) => {
            vals.push(val);
            return 3;
        })
        .then((val) => {
            vals.push(val);
            return 4;
        })
        .then((val) => {
            vals.push(val);
            return 5;
        })
        .then((val) => {
            vals.push(val);
            return 6;
        })
        .then((val) => {
            vals.push(val);
            console.log(vals);
        });
}

async function executeAwaits() {
    const vals = [];
    vals.push(await Promise.resolve(1));
    vals.push(await Promise.resolve(2));
    vals.push(await Promise.resolve(3));
    vals.push(await Promise.resolve(4));
    vals.push(await Promise.resolve(5));
    vals.push(await Promise.resolve(6));
    console.log(vals);
}

function executePromiseAll() {
    Promise.all([Promise.resolve(1), Promise.resolve(2), Promise.resolve(3), Promise.resolve(4), Promise.resolve(5), Promise.resolve(6)]).then(
        (vals, rej) => {
            console.log(vals);
        }
    );
}

Run results for: Promise vs Async Await(2)

Promise Chain

Async Await

Promise.all

Promise Chain normal