Run results for: findIndex vs indexOf - JavaScript performance

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/119.0

Browser: Firefox 119

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
findIndex	11877.8 Ops/sec
indexOf	55248.4 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);

AخA
 
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:

findIndex
var index = arr.findIndex((num) => num === foo);
var index = arr.findIndex((num) => num === foo);
indexOf
var index = arr.indexOf(foo);
var index = arr.indexOf(foo);