Benchmark: deep copy methods

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

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function spreadCopy (data) {
	const copy = { ...data };
    return copy;
}

function assignCopy (data) {
	const copy = Object.assign({}, data);
  	return copy;
}

function JSONCopy (data) {
	const copy = JSON.parse(JSON.stringify(data));
  	return copy;
}

function lodashCopy (data) {
	const copy = _.cloneDeep(data);
	return copy;
}

Tests:

Spread
spreadCopy(source)
Object.assign
assignCopy(source)
JSON methods
JSONCopy(source)
Lodash cloneDeep
lodashCopy(source)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Spread
Object.assign
JSON methods
Lodash cloneDeep

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 6 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36

Browser/OS: Chrome 118 on Windows

View result in a separate tab

Test name	Executions per second
Spread	8024162.0 Ops/sec
Object.assign	3722678.0 Ops/sec
JSON methods	56378.8 Ops/sec
Lodash cloneDeep	56434.4 Ops/sec

deep copy methods (version: 0)

compare spread, object.assign, JSON methods and lodash deepClone

Comparing performance of: Spread vs Object.assign vs JSON methods vs Lodash cloneDeep

Created: 6 months ago by: Guest

Jump to the latest result

Spread

Object.assign

JSON methods

Lodash cloneDeep

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A