Run results for: Lodash cloneDeep vs structuredClone vs JSON Parse (deep object)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.3.1 Safari/605.1.15

Browser: Safari 26

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 15 days ago

Test name	Executions per second
Lodash cloneDeep	790365.1 Ops/sec
Native structuredClone	297573.3 Ops/sec
JSON Parse	451598.4 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));

Run results for: Lodash cloneDeep vs structuredClone vs JSON Parse (deep object)

https://developer.mozilla.org/en-US/docs/Web/API/structuredClone

Lodash cloneDeep

Native structuredClone

JSON Parse