Run results for: findIndex vs indexOf - JavaScript performance

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/25.0 Chrome/121.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 121

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

indexOf

359K/s

findIndex

1K/s

View exact numbers

Test name	Executions per second
✓ indexOf	358,750 Ops/sec
findIndex	1,014 Ops/sec

Script Preparation code:

var arr = new Array(15000);
arr.fill({ id: 0 });
arr = arr.map((el, idx) => el.id = idx);
var foo = Math.floor(Math.random() * 15000);

Tests: