Run results for: findIndex vs indexOf vs object property

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:146.0) Gecko/20100101 Firefox/146.0

Browser: Firefox 146

Operating system: Linux

Device Platform: Desktop

Date tested: 9 months ago

Benchmark engine: Benchmark.js

object property

765.4M/s

indexOf

17K/s

findIndex

7K/s

View exact numbers

Test name	Executions per second
✓ object property	765,432,832 Ops/sec
indexOf	16,822 Ops/sec
findIndex	6,649 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]