Run results for: findIndex primitive vs findIndex object

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36

Browser: Chrome 89

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
findIndex non-primitive	2634.8 Ops/sec
findIndex primitive	1172.2 Ops/sec

Script Preparation code:

var arrN = new Array(15000);

for (var i = 0; i < 15000; i++) {
	arrN[i] = { id: i };
}

var randN = Math.floor(Math.random() * 15000);

var arrP = new Array(15000);

for (var i = 0; i < 15000; i++) {
	arrP[i] = i;
}

var randP = Math.floor(Math.random() * 15000);

Tests:

findIndex non-primitive
var indexN = arrN.findIndex((num) => num['id'] === randN);
findIndex primitive
var indexP = arrP.findIndex((num) => num === randP);

Run results for: findIndex primitive vs findIndex object

Difference within findIndex itself in performance between comparing primitive and non-primitive values.

findIndex non-primitive

findIndex primitive