Run results for: findIndex vs indexOf - JavaScript performance 2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36

Browser: Chrome 85

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
findIndex	818.0 Ops/sec
indexOf	83601.0 Ops/sec

Script Preparation code:

var arr = new Array(15000);

for (var i = 0; i < 15000; i++) {
	arr.fill({ id: i });
}

numArr = arr.map((el, idx) => el.id = idx);
var foo = Math.floor(Math.random() * 15000);

​x
 
var arr = new Array(15000);​for (var i = 0; i < 15000; i++) {    arr.fill({ id: i });}​numArr = arr.map((el, idx) => el.id = idx);var foo = Math.floor(Math.random() * 15000);

Tests:

findIndex
var index = arr.findIndex((obj) => obj.num === foo);
var index = arr.findIndex((obj) => obj.num === foo);
indexOf
var index = numArr.indexOf(foo);
var index = numArr.indexOf(foo);