Run results for: structuredClone(JSON.stringify) vs structuredClone

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:143.0) Gecko/20100101 Firefox/143.0

Browser: Firefox 143

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 10 months ago

JSON.stringify

692K/s

structuredClone

323K/s

View exact numbers

Test name	Executions per second
✓ JSON.stringify	691,817 Ops/sec
structuredClone	322,609 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 = structuredClone(JSON.parse(JSON.stringify(MyObject)));
structuredClone
myCopy = structuredClone(MyObject);

Run results for: structuredClone(JSON.stringify) vs structuredClone

JSON.stringify vs structuredClone

JSON.stringify

structuredClone