Run results for: Lodash cloneDeep vs structuredClone vs JSON Parse vs JSON indirect parse vs in-house deepcopy

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser: Chrome 123

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 6 months ago

Test name	Executions per second
Lodash cloneDeep	597783.7 Ops/sec
Native structuredClone	81082.8 Ops/sec
JSON Parse	1189524.9 Ops/sec
Indirect JSON Parse	1098014.4 Ops/sec
In-house deepcopy	1701146.5 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...'
  }
};

var myCopy = null;
var s = '';
function deepcopy(o) {
    if (o instanceof Array) {
      return Array.from(o, deepcopy)
    }
    const c = Object.assign({}, o)
    for (const k of Object.keys(o)) {
      if (typeof o[k] === 'object' && o[k]) {
        c[k] = deepcopy(o[k])
      }
    }
    return c
  }

Tests:

Lodash cloneDeep
myCopy = _.cloneDeep(MyObject);
Native structuredClone
myCopy = structuredClone(MyObject);
JSON Parse
myCopy = JSON.parse(JSON.stringify(MyObject));
Indirect JSON Parse
s = JSON.stringify(MyObject); myCopy = JSON.parse(s);
In-house deepcopy
myCopy = deepcopy(MyObject);

Run results for: Lodash cloneDeep vs structuredClone vs JSON Parse vs JSON indirect parse vs in-house deepcopy

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

Lodash cloneDeep

Native structuredClone

JSON Parse

Indirect JSON Parse

In-house deepcopy