Run results for: Map vs Object (3)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:147.0) Gecko/20100101 Firefox/147.0

Browser: Firefox 147

Operating system: Windows

Device Platform: Desktop

Date tested: 5 months ago

Map get

43/s

Obj get

38/s

Map set

31/s

Obj set

30/s

Map get after all

17/s

Obj get after all

15/s

View exact numbers

Test name	Executions per second
✓ Map get	43 Ops/sec
Obj get	38 Ops/sec
Map set	31 Ops/sec
Obj set	30 Ops/sec
Map get after all	17 Ops/sec
Obj get after all	15 Ops/sec

Script Preparation code:

var map = new Map();
var obj = {};

var i = 0,
    count = 100000,
    a;

function getKey(i) {
    return `i-${i}`;
}

// set default values
for (i = 0; i < count; i++) {
    var key = getKey(i);
    var value = {
        i,
        key
    };
    map.set(key, value);
    obj[key] = value;
}

Tests:

Map get
for (i = 0; i < count; i++) { a = map.get(getKey(i)); }
Obj get
for (i = 0; i < count; i++) { a = obj[getKey(i)]; }
Map set
for (i = 0; i < count; i++) { var value = { i, key }; map.set(getKey(i + count), value); }
Obj set
for (i = 0; i < count; i++) { var value = { i, key }; obj[getKey(i + count)] = value; }
Map get after all
for (i = 0; i < count * 2; i++) { a = map.get(getKey(i)); }
Obj get after all
for (i = 0; i < count * 2; i++) { a = obj[getKey(i)]; }