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Run results for:
promise vs callback vs async
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<iframe src="https://measurethat.net/Embed?id=504411" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 16_1_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.1 Mobile/15E148 Safari/604.1
Browser:
Mobile Safari 16
Operating system:
iOS 16.1.1
Device Platform:
Mobile
Date tested:
2 years ago
Test name
Executions per second
async
450800.5 Ops/sec
callback
1529838.9 Ops/sec
promise
1009545.0 Ops/sec
Tests:
async
async function getData() { return new Promise((resolve, reject) => { setTimeout(() => { const data = 'Some data'; resolve(data); }, 0); }); } async function main() { const data = await getData(); console.log(data); } main();
callback
function getData(callback) { setTimeout(() => { const data = 'Some data'; callback(data); }, 0); } getData((data) => { console.log(data); });
promise
function getData() { return new Promise((resolve, reject) => { setTimeout(() => { const data = 'Some data'; resolve(data); }, 0); }); } getData().then((data) => { console.log(data)})