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JavaScript spread operator vs Object.assign vs direct member access performance
(version: 1)
Comparing performance of:
Using the spread operator vs Using Object.assign vs direct member access
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);
direct member access
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = { sampleData: firstObject['sampleData'], moreData: secondObject['moreData'] };
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
direct member access
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 Edg/133.0.0.0
Browser/OS:
Chrome 133 on Windows
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<iframe src="https://measurethat.net/Embed?id=588282" width="100%" height="500px"></iframe>
Test name
Executions per second
Using the spread operator
37505204.0 Ops/sec
Using Object.assign
40245532.0 Ops/sec
direct member access
143762640.0 Ops/sec
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JavaScript spread operator vs Object.assign performance: empty src2
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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 (new object) performance
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