Run results for: structuredClone vs spread vs Object.assign syntax

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 OPR/106.0.0.0

Browser: Opera 106

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Spread syntax

20.3M/s

Object assign

4.1M/s

window.structuredClone

350K/s

View exact numbers

Test name	Executions per second
✓ Spread syntax	20,304,846 Ops/sec
Object assign	4,135,484 Ops/sec
window.structuredClone	350,139 Ops/sec

Script Preparation code:

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

Tests:

window.structuredClone
const copy = window.structuredClone(voucher);
Spread syntax
const copy = { ...voucher };
Object assign
const copy = {}; Object.assign(copy, voucher)