Run results for: Map vs Object (R+W) 1k

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:79.0) Gecko/20100101 Firefox/79.0

Browser: Firefox 79

Operating system: Linux

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Map	1399.0 Ops/sec
Object	1509.1 Ops/sec

Script Preparation code:

var map = new Map();
var obj = {};
var count = 1000;
var i = 0, a;

Tests:

Map
for (i = 0; i < count; i++) { map.set((i * 10000).toString(), i); } for (i = 0; i < count; i++) { a = map.get((i * 10000).toString()); }
Object
for (i = 0; i < count; i++) { obj[(i * 10000).toString()] = i; } for (i = 0; i < count; i++) { a = obj[(i * 10000).toString()]; }