Run results for: lodash cloneDeep vs. JSON.parse(JSON.stringify()) vs. structuredClone vs

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

rfdc

6.0M/s

recursiveDeepCopy

5.5M/s

lodash cloneDeep

1.8M/s

JSON.parse(JSON.stringify())

1.5M/s

structuredClone

725K/s

View exact numbers

Test name	Executions per second
✓ rfdc	6,001,966 Ops/sec
recursiveDeepCopy	5,450,730 Ops/sec
lodash cloneDeep	1,751,218 Ops/sec
JSON.parse(JSON.stringify())	1,524,554 Ops/sec
structuredClone	724,752 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js'></script>
<script src='https://cdn.jsdelivr.net/npm/jsondiffpatch@0.4.1/dist/jsondiffpatch.umd.min.js'></script>
<script src='https://cdn.jsdelivr.net/npm/rfdc@1.3.0'></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...'
  }
};

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);

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

lodash cloneDeep

JSON.parse(JSON.stringify())

recursiveDeepCopy

structuredClone

rfdc