Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
JavaScript spread operator vs Object.assign performance vs Adding to object one
(version: 1)
Comparing performance of:
Using the spread operator vs Using Object.assign vs Add to first
Created:
one year ago
by:
Guest
Jump to the latest result
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);
Add to first
const firstObject = { sampleData: 'Hello world' } firstObject.moreData = 'foo bar'
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
Fork
Test case name
Result
Using the spread operator
Using Object.assign
Add to first
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
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/OS:
Chrome 133 on Windows
View result in a separate tab
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=588673" width="100%" height="500px"></iframe>
Test name
Executions per second
Using the spread operator
32595898.0 Ops/sec
Using Object.assign
30302430.0 Ops/sec
Add to first
163756656.0 Ops/sec
Related benchmarks:
JavaScript spread operator vs Object.assign performance (with empty object in Object.assign)
JavaScript spread operator vs Object.assign performance: empty src2
JavaScript spread operator vs Object.assign performance creating a new object
JavaScript spread operator vs Object.assign performance with New Object Twice
JavaScript spread operator vs Object.assign existing vs Object.assign new performance
JavaScript spread operator vs Object.assign (to new object) performance
JavaScript spread operator vs Object.assign performance with new object in assign
JavaScript spread operator vs Object.assign (with new object) performance
JavaScript spread operator vs Object.assign vs assign to empty - performance
Comments
Confirm delete:
Do you really want to delete benchmark?