Run results for: JS spread operator vs concat method

Run details:

User agent: Mozilla/5.0 (Linux; Android 7.0; LG-M400) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.101 Mobile Safari/537.36

Browser: Chrome Mobile 87

Operating system: Android 7.0

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
coping array using spread operator	260715.7 Ops/sec
coping array using concat method	241946.3 Ops/sec

Script Preparation code:

var arr = [];
for (i = 0; i < 10; i++) {
    arr.push(i);
}

Tests:

coping array using spread operator
const result = [...arr, ...arr, ...arr]; return result;
coping array using concat method
const result = arr.concat(arr, arr); return result