Run results for: then vs. async-await

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.3 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 16

Operating system: iOS 16.3.1

Device Platform: Mobile

Date tested: one year ago

Benchmark engine: Benchmark.js

then

4.6M/s

async-await

4.0M/s

View exact numbers

Test name	Executions per second
✓ then	4,569,894 Ops/sec
async-await	3,991,202 Ops/sec

Tests:

then
function one() { return new Promise((resolve, reject) => { return resolve(`hi`); }); } function khw() { one().then((message) => console.log(message)); } khw();
async-await
function one() { return new Promise((resolve, reject) => { return resolve(`hi`); }); } async function khw() { console.log(await one()); } khw();