Run results for: findIndex vs indexOf - JavaScript performance

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36 OPR/120.0.0.0

Browser: Opera 120

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 11 months ago

indexOf

1.9M/s

findIndex

220K/s

View exact numbers

Test name	Executions per second
✓ indexOf	1,852,620 Ops/sec
findIndex	220,099 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: