Run results for: promise vs callback

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/128.0.6613.98 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 128

Operating system: iOS 18.0

Device Platform: Mobile

Date tested: one year ago

callback

94.8M/s

async

12.2M/s

View exact numbers

Test name	Executions per second
✓ callback	94,836,192 Ops/sec
async	12,165,499 Ops/sec

Tests:

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