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Run results for:
Lodash cloneDeep vs structuredClone vs JSON Parse vs fastDeepClone
https://developer.mozilla.org/en-US/docs/Web/API/structuredClone
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=622421" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36 Edg/142.0.0.0
Browser:
Chrome 142
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
4 months ago
Test name
Executions per second
Lodash cloneDeep
284834.3 Ops/sec
Native structuredClone
312757.9 Ops/sec
JSON Parse
270660.0 Ops/sec
custom fastCloneDeep
1239927.4 Ops/sec
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...' }, deeper: { 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...' }, deeper: { 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...' }, wayWayDown: { 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...' }, date: new Date(), set: new Set([1,2,3,4,5]), map: new Map([['a','b'],['c','d']]) } } } }; var myCopy = null;
Tests:
Lodash cloneDeep
myCopy = _.cloneDeep(MyObject);
Native structuredClone
myCopy = structuredClone(MyObject);
JSON Parse
myCopy = JSON.parse(JSON.stringify(MyObject));
custom fastCloneDeep
function fastCloneDeep(value) { if (value === null || typeof value !== 'object') return value; if (Array.isArray(value)) return value.map(fastCloneDeep); if (value instanceof Date) return new Date(value.getTime()); const cloned = {}; for (const key in value) { if (Object.prototype.hasOwnProperty.call(value, key)) { cloned[key] = fastCloneDeep(value[key]); } } return cloned; } myCopy = fastCloneDeep(MyObject);