Run results for: promise vs callback

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_0_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.0.1

Device Platform: Mobile

Date tested: one year ago

callback

74.3M/s

async

7.3M/s

View exact numbers

Test name	Executions per second
✓ callback	74,293,456 Ops/sec
async	7,329,756 Ops/sec

Tests:

async
(async() => { await true; })();
callback
((next) => {next()})(() => {});