Run results for: promise vs callback 123

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/93.0.4577.78 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 93

Operating system: iOS 15.7

Device Platform: Mobile

Date tested: 2 years ago

callback

5.7M/s

async

2.2M/s

View exact numbers

Test name	Executions per second
✓ callback	5,655,056 Ops/sec
async	2,224,068 Ops/sec

Script Preparation code:

function promises() {
  return Promise.resolve(123)
}
function callbacks(cb) {
  return cb(123)
}

Tests:

async
promises()
callback
callbacks((_) => {})