Run results for: JSON.stringify vs structuredClone, modifications

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser: Chrome 119

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

JSON.stringify

510K/s

structuredClone

261K/s

View exact numbers

Test name	Executions per second
✓ JSON.stringify	510,405 Ops/sec
structuredClone	261,317 Ops/sec

Script Preparation code:

var MyObject = {
  description: 'Creates a deep copy of source, which should be an object or an array.',
  myNumber: 10,
  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
MyObject.myNumber++; myCopy = JSON.parse(JSON.stringify(MyObject));
structuredClone
MyObject.myNumber++; myCopy = structuredClone(MyObject);