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Run results for:
Spread vs Object.assign vs Object.keys with forEach
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=542119" 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/128.0.0.0 Safari/537.36
Browser:
Chrome 128
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Benchmark engine:
Benchmark.js
Using the spread operator
23.5M/s
Using Object.assign
6.5M/s
Not merging
3.7M/s
View exact numbers
Test name
Executions per second
✓
Using the spread operator
23,466,914 Ops/sec
Using Object.assign
6,466,727 Ops/sec
Not merging
3,696,501 Ops/sec
Tests:
Using the spread operator
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = { ...firstObject, ...secondObject };
Using Object.assign
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = Object.assign(firstObject, secondObject);
Not merging
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = {} Object.keys(firstObject).forEach(key => {finalObject[key] = firstObject[key] }) Object.keys(secondObject).forEach(key => {finalObject[key] = secondObject[key] })