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/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Object access

64.2M/s

Map get

49.8M/s

Array find

10.8M/s

View exact numbers

Test name	Executions per second
✓ Object access	64,249,944 Ops/sec
Map get	49,783,916 Ops/sec
Array find	10,818,732 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