Benchmark: Promise vs Async Await

Script Preparation code:


function executePromises() {
  let 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);
    });
}

async function executeAwaits() {
  const val  = await Promise.resolve(1);
  const val2 = await Promise.resolve(2);
  const val3 = await Promise.resolve(3);
  const val4 = await Promise.resolve(4);
  const val5 = await Promise.resolve(5);
  const val6 = await Promise.resolve(6);
  const vals = [val, val2, val3, val4, val5, val6];
  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);
  });
}

Tests:

Promise Chain
executePromises();
Async Await
executeAwaits();
Promise.all
executePromiseAll()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Promise Chain
Async Await
Promise.all

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 5 days ago)

User agent: Mozilla/5.0 (Linux; Android 14; Mobile; rv:127.0) Gecko/127.0 Firefox/127.0

Browser/OS: Firefox Mobile 127 on Android

View result in a separate tab

Test name	Executions per second
Promise Chain	105349.7 Ops/sec
Async Await	156437.0 Ops/sec
Promise.all	21420.6 Ops/sec

Promise vs Async Await (version: 0)

Comparing performance of: Promise Chain vs Async Await vs Promise.all

Created: one year ago by: Registered User

Jump to the latest result

Promise Chain

Async Await

Promise.all

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A