Run results for: findIndex vs indexOf vs object property

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36

Browser: Chrome 103

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
indexOf	25962.0 Ops/sec
findIndex	1866.5 Ops/sec
object property	7451934.0 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]