Benchmark: JSON.stringify vs structuredClone vs cloneLineageData vs cloneDeep

HTML Preparation code:

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

Script Preparation code:

var MyObject = {
  description: 'Creates a deep copy of source, which should be an object or an array.',
  myNumber: 123456789,
  myBoolean: true,
  jayson: {
    stringify: 'JSON.stringify() method converts a JavaScript value to a JSON string....',
    parse: 'JSON.parse() method parses a JSON string...'
  },
  mySet: new Set([1,2,3,1]),
  myList: [1,3,4,5,67,'ab'],
  myDate: new Date(),
};

var myCopy = null;

Tests:

JSON.stringify
myCopy = JSON.parse(JSON.stringify(MyObject));
structuredClone
myCopy = structuredClone(MyObject);
cloneLineageData
const cloneLineageData = (toClone) => { if (typeof toClone !== 'object' || toClone === null) return toClone; if (toClone instanceof Set) { return new Set(toClone); } if (Array.isArray(toClone)) { return toClone.map(cloneLineageData); } if (toClone instanceof Date) { return new Date(toClone); } const cloned = { ...toClone }; const clonedObjKeys = Object.keys(cloned); for (let i = 0; i < clonedObjKeys.length; i += 1) { const key = clonedObjKeys[i]; cloned[key] = cloneLineageData(cloned[key]); } return cloned; }; myCopy = cloneLineageData(MyObject);
lodash.cloneDeep
myCopy = _.cloneDeep(MyObject);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
JSON.stringify
structuredClone
cloneLineageData
lodash.cloneDeep

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one month ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36

Browser/OS: Chrome 127 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
JSON.stringify	478523.2 Ops/sec
structuredClone	501116.2 Ops/sec
cloneLineageData	651536.2 Ops/sec
lodash.cloneDeep	495595.4 Ops/sec

JSON.stringify vs structuredClone vs cloneLineageData vs cloneDeep (version: 0)

JSON.stringify vs structuredClone vs cloneLineageData vs cloneDeep

Comparing performance of: JSON.stringify vs structuredClone vs cloneLineageData vs lodash.cloneDeep

Created: one month ago by: Registered User

Jump to the latest result

JSON.stringify

structuredClone

cloneLineageData

lodash.cloneDeep

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A