Run results for: Object cloning comparision

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36

Browser: Chrome 110

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Spread	9849380.0 Ops/sec
structuredClone	549982.1 Ops/sec
JSON	983565.8 Ops/sec
simple assignment	12121800.0 Ops/sec

Script Preparation code:

var obj = {
	type: 'price',
	amount: '123',
	vatPercentage: 22,
	vatIncluded: true,
	vatId: 124153,
  	nestedObj: {
  		item1: 'abc',
  		item2: undefined
	}
};

var copy = undefined;

Tests:

Spread
copy = {...obj};
structuredClone
copy = structuredClone(obj);
JSON
copy = JSON.parse(JSON.stringify(obj));
simple assignment
copy = obj;

Run results for: Object cloning comparision

Spread

structuredClone

JSON

simple assignment