Run results for: Map vs Object vs Array @adelinolsn v1.1

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36 Edg/126.0.0.0

Browser: Chrome 126

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Map.get	310.8 Ops/sec
Object	315.8 Ops/sec

Script Preparation code:

var quantityOfElements = 1000000;
var array = new Array(quantityOfElements);
var quantityOfTests = 10000;

for (let i = 0; i < quantityOfElements; i++) {
    array[i] = {
        id: i
    };
}

var map = new Map();

for (let i = 0; i < quantityOfElements; i++) {
    map.set(array[i].id, array[i]);
}

var obj = {};

for (let i = 0; i < quantityOfElements; i++) {
    obj[array[i].id] = array[i];
}

Tests:

Map.get
for (let i = 0; i < quantityOfTests; i++) { const random = Math.floor(Math.random() * (quantityOfElements - 1)); map.get(random); }
Object
for (let i = 0; i < quantityOfTests; i++) { const random = Math.floor(Math.random() * (quantityOfElements - 1)); obj[random]; }

Run results for: Map vs Object vs Array @adelinolsn v1.1

Map.get

Object