Run results for: sync vs promise

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.3.2

Device Platform: Mobile

Date tested: one year ago

sync

146.8M/s

promise

6.5M/s

View exact numbers

Test name	Executions per second
✓ sync	146,802,992 Ops/sec
promise	6,466,930 Ops/sec

Script Preparation code:

var sync = (foo) => { return foo; };
var promise = (foo) => { return Promise.resolve(foo); };

Tests:

sync
(function () { sync('test'); })();
promise
(async function () { await promise('test'); })();