Run results for: Map vs Object // reallyLongName_

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.99 Safari/537.36

Browser: Chrome 93

Operating system: Windows 7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Map lookup	1679.4 Ops/sec
Obj lookup	1768.1 Ops/sec

Script Preparation code:

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

Tests:

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

Run results for: Map vs Object // reallyLongName_

Lookup of map vs object

Map lookup

Obj lookup