Run results for: Access time Map vs Object

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:124.0) Gecko/20100101 Firefox/124.0

Browser: Firefox 124

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Object access

13.2M/s

Map access

13.1M/s

View exact numbers

Test name	Executions per second
✓ Object access	13,228,844 Ops/sec
Map access	13,059,045 Ops/sec

Script Preparation code:

const myVar = 'test'
const myMap = new Map();
const myObj = {};

for(let i = 0; i < 100; i++) {
  const newVar = `${myVar}${i}`;
  myMap.set(newVar, 0);
  myObj[newVar] = 0;
}

const length = 100000000;

Tests:

Object access
for (let i=0; i < length; i++) { myObj.test; }
Map access
for (let i=0; i < length; i++) { myMap.get('test'); }