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Run results for:
JavaScript spread operator vs Object.assign performance vs Adding to object one (size 5)
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<iframe src="https://measurethat.net/Embed?id=588674" 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/133.0.0.0 Safari/537.36
Browser:
Chrome 133
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Add to first
184.8M/s
Using Object.assign
14.8M/s
Using the spread operator
12.6M/s
View exact numbers
Test name
Executions per second
✓
Add to first
184,790,864 Ops/sec
Using Object.assign
14,792,226 Ops/sec
Using the spread operator
12,562,954 Ops/sec
Tests:
Using the spread operator
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData1: 'foo bar', moreData2: 'foo bar', moreData3: 'foo bar', moreData4: 'foo bar', moreData5: 'foo bar' } const finalObject = { ...firstObject, ...secondObject };
Using Object.assign
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData1: 'foo bar', moreData2: 'foo bar', moreData3: 'foo bar', moreData4: 'foo bar', moreData5: 'foo bar' } const finalObject = Object.assign(firstObject, secondObject);
Add to first
const firstObject = { sampleData: 'Hello world' } firstObject.moreData1 = 'foo bar' firstObject.moreData2 = 'foo bar' firstObject.moreData3 = 'foo bar' firstObject.moreData4 = 'foo bar' firstObject.moreData5 = 'foo bar'