Run results for: js Map get VS Obj[key]

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36

Browser: Chrome 137

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 11 months ago

Test name	Executions per second
Map	21686.4 Ops/sec
Obj	38807.7 Ops/sec

HTML Preparation code:


<div id=''></div>

Script Preparation code:

var i = 0,
    count = 1000,
    a;
var map = new Map();
var obj = {};
for (i = 0; i < count; i++) {
    obj[i] = i * i;
    map.set(i, i * i);
}


console.log('map/obj:: ', {
    map,
    obj
});

Tests:

Map
for (i = 0; i < count; i++) { map.get(i); }
Obj
for (i = 0; i < count; i++) { obj[i]; }