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Run results for:
Spread vs Object.assign (modify ) vs Object.assign (new)
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=567333" 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/130.0.0.0 Safari/537.36
Browser:
Chrome 130
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Spread
6.1M/s
Object.assign (modify)
3.3M/s
Object.assign (new)
2.9M/s
View exact numbers
Test name
Executions per second
✓
Spread
6,091,696 Ops/sec
Object.assign (modify)
3,308,586 Ops/sec
Object.assign (new)
2,885,490 Ops/sec
Script Preparation code:
var obj1 = { a: 'a' };
Tests:
Spread
const obj2 = {...obj1, b: 'b'};
Object.assign (modify)
const obj2 = Object.assign(obj1, {b: 'b'});
Object.assign (new)
const obj2 = Object.assign({}, obj1, {b: 'b'});