Run results for: findIndex vs indexOf random

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:77.0) Gecko/20100101 Firefox/77.0

Browser: Firefox 77

Operating system: Linux

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
indexOf	52315.7 Ops/sec
findIndex	51847960.0 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);