Run results for: Object key access vs array find vs map

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36

Browser: Chrome 130

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Map get

3.6M/s

Object access

3.4M/s

Array find

2.5M/s

View exact numbers

Test name	Executions per second
✓ Map get	3,552,910 Ops/sec
Object access	3,401,410 Ops/sec
Array find	2,486,788 Ops/sec

Script Preparation code:

var items = Array.from(Array(1000), (_, x) => ({
    key: x,
    value: x * 10
}));

var objContainer = {};
var arrContainer = [];
var mapContainer = new Map();

for (let i = 100; i >= 0; i--) {
    const index = Math.floor(Math.random() * 1000);
    const item = items[index];
    objContainer[item.key] = item;
    arrContainer.push(item);
    mapContainer.set(item.key, item)
}

Tests:

Object access
items.every(item => objContainer[item.key])
Array find
items.every(item => arrContainer.find(containerItem => containerItem.key === item.key))
Map get
items.every(item => mapContainer.get(item.key))

Run results for: Object key access vs array find vs map

Test speed of object access by key vs array vs map find to find object

Object access

Array find

Map get