Run results for: JSON parse JSON stringify vs structuredClone

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.0.1 Safari/605.1.15

Browser: Safari 26

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 7 months ago

Test name	Executions per second
Parse/Stringify	3478759.2 Ops/sec
Native structuredClone	1038200.4 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:

Parse/Stringify
myCopy = JSON.parse(JSON.stringify(MyObject));
Native structuredClone
myCopy = structuredClone(MyObject);

Run results for: JSON parse JSON stringify vs structuredClone

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

Parse/Stringify

Native structuredClone