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Run results for:
JavaScript spread operator vs Object.assign performance with overwite
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<iframe src="https://measurethat.net/Embed?id=538816" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 YaBrowser/24.7.0.0 Safari/537.36
Browser:
Yandex Browser 24
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Using the spread operator
16.5M/s
Using Object.assign
5.6M/s
Using Object.assign with into empty object
4.9M/s
View exact numbers
Test name
Executions per second
✓
Using the spread operator
16,492,294 Ops/sec
Using Object.assign
5,591,486 Ops/sec
Using Object.assign with into empty object
4,944,587 Ops/sec
Tests:
Using the spread operator
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar', sampleData: 'baz' } const finalObject = { ...firstObject, ...secondObject };
Using Object.assign
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar', sampleData: 'baz' } const finalObject = Object.assign(firstObject, secondObject);
Using Object.assign with into empty object
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar', sampleData: 'baz' } const finalObject = Object.assign({}, firstObject, secondObject);