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

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36 Edg/143.0.0.0

Browser: Chrome 143

Operating system: Linux

Device Platform: Desktop

Date tested: 7 months ago

lodash cloneDeep

1.7M/s

JSON.parse(JSON.stringify())

1.3M/s

structuredClone

526K/s

View exact numbers

Test name	Executions per second
✓ lodash cloneDeep	1,663,171 Ops/sec
JSON.parse(JSON.stringify())	1,282,402 Ops/sec
structuredClone	526,226 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 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;

Tests:

lodash cloneDeep
myCopy = _.cloneDeep(MyObject);
JSON.parse(JSON.stringify())
myCopy = JSON.parse(JSON.stringify(MyObject));
structuredClone
myCopy = structuredClone(MyObject);