Run results for: Map vs Object (2)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.5 Safari/605.1.15

Browser: Safari 15

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Map lookup	25.9 Ops/sec
Obj lookup	21.8 Ops/sec

Script Preparation code:

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

Tests:

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

Run results for: Map vs Object (2)

Lookup of map vs object

Map lookup

Obj lookup