Run results for: Map vs Object with 10k elements

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:133.0) Gecko/20100101 Firefox/133.0

Browser: Firefox 133

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Obj lookup

325K/s

Map lookup

297K/s

View exact numbers

Test name	Executions per second
✓ Obj lookup	325,303 Ops/sec
Map lookup	296,928 Ops/sec

Script Preparation code:

var map = new Map();
var obj = {};

for(let i = 0; i < 10000; i++) { 
  map.set(i, 5);
  obj[i] = 5;
}

var i = 0, count = 1000, a;

Tests: