Run results for: JSON.stringify vs structuredClone 3

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36

Browser: Chrome 143

Operating system: Linux

Device Platform: Desktop

Date tested: 2 months ago

JSON.stringify

311K/s

structuredClone

242K/s

View exact numbers

Test name	Executions per second
✓ JSON.stringify	310,628 Ops/sec
structuredClone	242,371 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
var obj = { [Math.random(2000).toString()]: Math.random(2000).toString(), ...MyObject, [Math.random(2000).toString()]: Math.random(2000).toString(), }; myCopy = JSON.parse(JSON.stringify(obj));
structuredClone
var obj = { [Math.random(2000).toString()]: Math.random(2000).toString(), ...MyObject, [Math.random(2000).toString()]: Math.random(2000).toString(), }; myCopy = structuredClone(obj);