Run results for: Lodash cloneDeep vs structuredClone vs JSON.stringify/parse

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36

Browser: Chrome 141

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 9 months ago

Benchmark engine: Benchmark.js

Lodash cloneDeep

1.8M/s

JSON.stringify / parse

1.5M/s

Native structuredClone

795K/s

View exact numbers

Test name	Executions per second
✓ Lodash cloneDeep	1,832,181 Ops/sec
JSON.stringify / parse	1,493,584 Ops/sec
Native structuredClone	795,247 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;

Tests:

Lodash cloneDeep
myCopy = _.cloneDeep(MyObject);
Native structuredClone
myCopy = structuredClone(MyObject);
JSON.stringify / parse
myCopy = JSON.parse(JSON.stringify(MyObject));

Run results for: Lodash cloneDeep vs structuredClone vs JSON.stringify/parse

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

Lodash cloneDeep

Native structuredClone

JSON.stringify / parse