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Run results for:
Spread vs Object.assign vs Object.keys
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<iframe src="https://measurethat.net/Embed?id=499420" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36
Browser:
Chrome 120
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
Using the spread operator
33.7M/s
Using Object.assign
12.7M/s
Not merging
8.8M/s
View exact numbers
Test name
Executions per second
✓
Using the spread operator
33,656,164 Ops/sec
Using Object.assign
12,721,795 Ops/sec
Not merging
8,828,485 Ops/sec
Tests:
Using the spread operator
const firstObject = { sampleData: 'Hello world',sampleData2: 'Hello world',sampleData3: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = { ...firstObject, ...secondObject };
Using Object.assign
const firstObject = { sampleData: 'Hello world',sampleData2: 'Hello world',sampleData3: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = Object.assign(firstObject, secondObject);
Not merging
const firstObject = { sampleData: 'Hello world',sampleData2: 'Hello world',sampleData3: 'Hello world' } const secondObject = { moreData: 'foo bar' } Object.keys(firstObject).map(key => {firstObject[key] = firstObject[key] })