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JavaScript spread operator vs Object.assign vs assign to empty - performance
(version: 1)
Comparing performance of:
Using the spread operator vs Using Object.assign vs Assign to an empty
Created:
one year ago
by:
Guest
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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);
Assign to an empty
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = Object.assign({}, firstObject, secondObject);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
Using the spread operator
Using Object.assign
Assign to an empty
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Browser/OS:
Chrome 130 on Mac OS X 10.15.7
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<iframe src="https://measurethat.net/Embed?id=567384" width="100%" height="500px"></iframe>
Test name
Executions per second
Using the spread operator
19180750.0 Ops/sec
Using Object.assign
6387943.5 Ops/sec
Assign to an empty
5495965.0 Ops/sec
Related benchmarks:
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JavaScript spread operator vs Object.assign performance (same behaviour)
JavaScript spread operator vs Object.assign performance equivalent
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 (to empty object) performance -1
JavaScript spread operator vs Object.assign (with new object) performance
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