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

Run details:

User agent: Mozilla/5.0 (Linux; Android 14; XQ-CT72 Build/64.2.F.2.233; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/138.0.7204.180 Mobile Safari/537.36 XWEB/1380143 MMWEBSDK/20250804 MMWEBID/5279 MicroMessenger/8.0.63.2900(0x28003F12) WeChat/arm64 Weixin NetType/WIFI Language/zh_CN ABI/arm64

Browser: Chrome Mobile 138

Operating system: Android

Device Platform: Mobile

Date tested: 11 months ago

JSON Parse

128K/s

Lodash cloneDeep

117K/s

Native structuredClone

82K/s

View exact numbers

Test name	Executions per second
✓ JSON Parse	128,174 Ops/sec
Lodash cloneDeep	116,581 Ops/sec
Native structuredClone	82,325 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));