Run results for: Shallow spread vs Deep Clone

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36 Edg/129.0.0.0

Browser: Chrome 129

Operating system: Windows

Device Platform: Desktop

Date tested: one month ago

Test name	Executions per second
Shallow spread	7168937.0 Ops/sec
Deep Clone	813486.6 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:

Shallow spread
myCopy = {...MyObject};
Deep Clone
myCopy = JSON.parse(JSON.stringify(MyObject));

Run results for: Shallow spread vs Deep Clone

Simple test showing, why Deep Clone should be use wisely.

Shallow spread

Deep Clone