Run results for: findIndex vs indexOf vs object property

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36 Edg/107.0.1418.56

Browser: Chrome 107

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
indexOf	30201.7 Ops/sec
findIndex	1177.1 Ops/sec
object property	3834205.0 Ops/sec

Script Preparation code:

var arr = new Array(15000);
arr.fill('')
arr = arr.map(el => Math.random().toString(36).replace(/[^a-z]+/g, '').substr(0, 8));
var foo = 'erjhfdjh';
arr[7500]=foo;
var obj = arr.reduce((acc,key,i)=>{acc[key]=i;return acc},{});

Tests:

indexOf
var index = arr.indexOf(foo);
findIndex
var index = arr.findIndex(o => o===foo);
object property
var index = obj[foo]