Run results for: findIndex vs indexOf - JavaScript performance

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:141.0) Gecko/20100101 Firefox/141.0

Browser: Firefox 141

Operating system: Ubuntu

Device Platform: Desktop

Date tested: one year ago

indexOf

105K/s

findIndex

12K/s

View exact numbers

Test name	Executions per second
✓ indexOf	104,750 Ops/sec
findIndex	12,254 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: