Run results for: JS spread operator vs concat method

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; MAR-LX1A) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.41 Mobile Safari/537.36 (Ecosia [email protected])

Browser: Chrome Mobile 101

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
coping array using spread operator	798839.6 Ops/sec
coping array using concat method	661479.8 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

Run results for: JS spread operator vs concat method

coping array using spread operator

coping array using concat method