Run results for: Map vs Object

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36 Aoyou/SkgqdmM5Sj9lUjJ8X1pTTpZ5DQf8vClHV4PS3YYPd3t47HMjMFepJg3a7w==

Browser: Chrome 86

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Map lookup	3808.2 Ops/sec
Obj lookup	3945.8 Ops/sec

Script Preparation code:

var map = new Map();
var obj = {};

map.set('a', 5);
obj['a'] = 5;

var i = 0, count = 1000, a;

Tests:

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

Run results for: Map vs Object

Lookup of map vs object

Map lookup

Obj lookup