Run results for: JSON.stringify vs structuredClone

Run details:

User agent: Mozilla/5.0 (Linux; Android 14; Pixel 6 Build/UQ1A.240105.002; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/120.0.6099.230 Mobile Safari/537.36 Mozilla/5.0 (Linux; Android 10; Karma for Reddit by /u/xineoph) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.85 Mobile Safari/537.36

Browser: Chrome Mobile 120

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

JSON.stringify

553K/s

structuredClone

206K/s

View exact numbers

Test name	Executions per second
✓ JSON.stringify	552,914 Ops/sec
structuredClone	206,233 Ops/sec

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);