Run results for: findIndex vs indexOf random

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36 OPR/73.0.3856.329

Browser: Opera 73

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
indexOf	61935.5 Ops/sec
findIndex	5443155.0 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);
var el = arr.findIndex(e => e.id === foo);

Tests:

indexOf
var res = arr.indexOf(el);
findIndex
var res = arr.findIndex(item => item.id === el.id);