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Run results for: lodash cloneDeep vs. JSON.parse(JSON.stringify()) vs. structuredClone vs | On a Small Object

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36
Chrome 134
Mac OS X 10.15.7
Desktop
8 days ago
Test name Executions per second
lodash cloneDeep 1818083.4 Ops/sec
JSON.parse(JSON.stringify()) 1608523.5 Ops/sec
recursiveDeepCopy 5922363.5 Ops/sec
structuredClone 745693.6 Ops/sec
rfdc 6479690.0 Ops/sec
HTML Preparation code:
AخA
 
1
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js'></script>
2
<script src='https://cdn.jsdelivr.net/npm/jsondiffpatch@0.4.1/dist/jsondiffpatch.umd.min.js'></script>
3
<script src='https://cdn.jsdelivr.net/npm/rfdc@1.3.0'></script>
Script Preparation code:
​x
 
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...'
  }
};
​
var myCopy = null;
​
var rfdcClone = rfdc();
​
///////////////////////////////////////////////////////////////////
function recursiveDeepCopy(o) {
    var newO,
      i;
  
    if (typeof o !== 'object') {
      return o;
    }
    if (!o) {
      return o;
    }
  
    if ('[object Array]' === Object.prototype.toString.apply(o)) {
      newO = [];
      for (i = 0; i < o.length; i += 1) {
        newO[i] = recursiveDeepCopy(o[i]);
      }
      return newO;
    }
  
    newO = {};
    for (i in o) {
      if (o.hasOwnProperty(i)) {
        newO[i] = recursiveDeepCopy(o[i]);
      }
    }
    return newO;
  }
​
Tests:

  • lodash cloneDeep

     
    myCopy = _.cloneDeep(MyObject);

  • JSON.parse(JSON.stringify())

     
    myCopy = JSON.parse(JSON.stringify(MyObject));

  • recursiveDeepCopy

     
    myCopy = recursiveDeepCopy(MyObject);

  • structuredClone

     
    myCopy = structuredClone(MyObject);

  • rfdc

     
    myCopy = rfdcClone(MyObject);