Run results for: Array.find vs Object

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36

Browser: Chrome 67

Operating system: Mac OS X 10.13.6

Device Platform: Desktop

Date tested: 6 years ago

Test name	Executions per second
Array.find	72661.3 Ops/sec
Object	3006971.0 Ops/sec

Script Preparation code:

var array = [];
var elements = 10000;

for (var i = 0; i < elements; i++) {
	array.push({
		index: i
	});
}

var arrayObject = {};

array.forEach(element => {
	arrayObject[element.index] = element;
});

​x
 
var array = [];var elements = 10000;​for (var i = 0; i < elements; i++) {    array.push({        index: i    });}​var arrayObject = {};​array.forEach(element => {    arrayObject[element.index] = element;});

Tests:

Array.find

let randomIndex = (Math.random() * (elements - 1)) | 0
	
let foundElement = array.find(element => element.index === randomIndex);

 
let randomIndex = (Math.random() * (elements - 1)) | 0    let foundElement = array.find(element => element.index === randomIndex);

Object

let randomIndex = (Math.random() * (elements - 1)) | 0
	
let foundElement = arrayObject[randomIndex];

 
let randomIndex = (Math.random() * (elements - 1)) | 0    let foundElement = arrayObject[randomIndex];