Run results for: Variable assignement

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/119.0

Browser: Firefox 119

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Map assignment

10.0M/s

Set assignment + condition

9.9M/s

Map assignment + condition

9.9M/s

Object Assignment + condition

9.9M/s

Object Assignment

9.9M/s

Set assignment

9.9M/s

View exact numbers

Test name	Executions per second
✓ Map assignment	9,996,473 Ops/sec
Set assignment + condition	9,940,818 Ops/sec
Map assignment + condition	9,903,452 Ops/sec
Object Assignment + condition	9,897,635 Ops/sec
Object Assignment	9,895,946 Ops/sec
Set assignment	9,866,978 Ops/sec

Script Preparation code:

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

Tests:

Object Assignment
for (let i=0; i < length; i++) { myObj.test = 1; }
Object Assignment + condition
for (let i=0; i < length; i++) { if (!myObj.test) myObj.test = 1; }
Set assignment
for (let i=0; i < length; i++) { mySet.add('test'); }
Set assignment + condition
for (let i=0; i < length; i++) { if (!mySet.has('test')) mySet.add('test'); }
Map assignment
for (let i=0; i < length; i++) { myMap.set('test', 1); }
Map assignment + condition
for (let i=0; i < length; i++) { if (!myMap.has('test')) myMap.set('test', 1); }