Run results for: Lodash cloneDeep vs JSON Clone vs freeze and destructure vs vanilla cloneDeep

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.41 Safari/537.36 Edg/101.0.1210.32

Browser: Chrome 101

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Lodash cloneDeep	497079.3 Ops/sec
Json clone	304872.4 Ops/sec
freeze and destructure	1297616.2 Ops/sec
Vanilla cloneDeep	73844.6 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;

function cloneDeep(entity, cache = new WeakMap) {
  const referenceTypes = ['Array', 'Object', 'Map', 'Set', 'Date'];
  const entityType = Object.prototype.toString.call(entity);
  if (
    !new RegExp(referenceTypes.join('|')).test(entityType) ||
    entity instanceof WeakMap ||
    entity instanceof WeakSet
  ) return entity;
  if (cache.has(entity)) {
    return cache.get(entity);
  }
  const c = new entity.constructor;
  
  if (entity instanceof Map) {
    entity.forEach((value, key) => c.set(cloneDeep(key), cloneDeep(value)));
  }
  if (entity instanceof Set) {
    entity.forEach((value) => c.add(cloneDeep(value)));
  }
  if (entity instanceof Date) {
    return new Date(entity);
  }
  cache.set(entity, c);
  return Object.assign(c, ...Object.keys(entity).map((prop) => ({ [prop]: cloneDeep(entity[prop], cache) })));
}

Tests:

Lodash cloneDeep
myCopy = _.cloneDeep(MyObject);
Json clone
myCopy = JSON.parse(JSON.stringify(MyObject));
freeze and destructure
Object.freeze(MyObject); myCopy = { ...MyObject };
Vanilla cloneDeep
myCopy = cloneDeep(MyObject)

Run results for: Lodash cloneDeep vs JSON Clone vs freeze and destructure vs vanilla cloneDeep

Lodash cloneDeep

Json clone

freeze and destructure

Vanilla cloneDeep