Run results for: structuredClone vs spread vs Object.assign()

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36 OPR/119.0.0.0 (Edition Yx 05)

Browser: Opera 119

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

spread syntax

51.2M/s

Object.assign()

6.2M/s

structuredClone()

593K/s

View exact numbers

Test name	Executions per second
✓ spread syntax	51,162,024 Ops/sec
Object.assign()	6,157,478 Ops/sec
structuredClone()	593,019 Ops/sec

Script Preparation code:

var oldObj = {
    "single": false,
    "applyOverTaxes": false,
    "discountType": "1",
    "value": 100,
    "minimumAmount": 0,
    "quantity": 1,
    "suffixLength": 8,
    "code": "IF5R0AFX",
    "vertical": true,
    "allowedPaymentMethods": null,
    "allowedBanks": null,
    "types": undefined,
    "partners": "Many",
    "startDate": "2020-10-21T00:00:00.000Z",
    "endDate": "2020-10-21T00:00:00.000Z",
    "applyed": false
}

Tests:

structuredClone()
const newObj = structuredClone(oldObj)
spread syntax
const newObj = {...oldObj}
Object.assign()
const newObj = Object.assign({}, oldObj)