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Run results for: JSON.stringify vs structuredClone vs cloneLineageData vs cloneDeep

JSON.stringify vs structuredClone vs cloneLineageData vs cloneDeep

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
Chrome 126
Mac OS X 10.15.7
Desktop
7 months ago
Test name Executions per second
JSON.stringify 538828.2 Ops/sec
structuredClone 481663.2 Ops/sec
cloneLineageData 660550.0 Ops/sec
lodash.cloneDeep 507855.0 Ops/sec
HTML Preparation code:
​x
 
1
​
2
<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);