Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Run results for:
JavaScript spread operator vs Object.assign vs new object performance
Go to the benchmark
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=626011" 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/145.0.0.0 Safari/537.36
Browser:
Chrome 145
Operating system:
Windows
Device Platform:
Desktop
Date tested:
5 months ago
New object
156.5M/s
Using the spread operator
63.5M/s
Using Object.assign
40.3M/s
View exact numbers
Test name
Executions per second
✓
New object
156,490,560 Ops/sec
Using the spread operator
63,483,112 Ops/sec
Using Object.assign
40,305,160 Ops/sec
Tests:
Using the spread operator
const firstObject = { sampleData: 'Hello world', moreData: 'foo bar', evenMoreData: 'overridethis' } const finalObject = { ...firstObject, evenMoreData: 'test' };
Using Object.assign
const firstObject = { sampleData: 'Hello world', moreData: 'foo bar', evenMoreData: 'overridethis' } const finalObject = Object.assign(firstObject, {evenMoreData: 'test'});
New object
const firstObject = { sampleData: 'Hello world', moreData: 'foo bar', evenMoreData: 'overridethis' } const finalObject = { sampleData: firstObject.sampleData, moreData: firstObject.firstObject, evenMoreData: 'test' };