Run results for: Map has vs Object hasOwnProperty

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:141.0) Gecko/20100101 Firefox/141.0

Browser: Firefox 141

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Obj lookup

7K/s

Map lookup

7K/s

View exact numbers

Test name	Executions per second
✓ Obj lookup	7,239 Ops/sec
Map lookup	6,657 Ops/sec

Script Preparation code:

var map = new Map();
var obj = {};

map.set('a', 5);
obj['a'] = 5;

var i = 0, count = 100000;

Tests: