Run results for: Map vs Object (w/delete)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.85 Safari/537.36

Browser: Chrome 90

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Map lookup	128857.9 Ops/sec
Obj lookup	132987.5 Ops/sec

Script Preparation code:

var map = new Map();
var obj = {};

map.set('a', 5);
obj['b'] = 5;
delete obj['b'];
obj['a'] = 5;

var i = 0, count = 10, a;

Tests: