Run results for: JSON.stringify + JSON.parse vs structuredClone on arrays

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36

Browser: Chrome 136

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

JSON.stringify + JSON.parse

2.0M/s

structuredClone

541K/s

View exact numbers

Test name	Executions per second
✓ JSON.stringify + JSON.parse	2,014,041 Ops/sec
structuredClone	541,013 Ops/sec

Script Preparation code:

const arrays = [
    [1, 2, 3, 5, 6],
    [0, 0, 0, 0, 0],
    [40, 23, 63, 19, 30]
];

Tests: