Run results for: JSON.stringify vs structuredClone vs _.cloneDeep

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser: Chrome 124

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

_.cloneDeep

1.6M/s ±1.98%

JSON.stringify

926K/s ±6.34%

structuredClone

529K/s ±1.40%

View exact numbers

Test name	Executions per second
✓ _.cloneDeep	1,608,182 Ops/sec ±1.98%
JSON.stringify	925,604 Ops/sec ±6.34%
structuredClone	529,113 Ops/sec ±1.40%

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/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:

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