Run results for: JS spread operator vs concat method

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.2 Safari/605.1.15

Browser: Safari 14

Operating system: Mac OS X 10.15.6

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
coping array using spread operator	2671542.0 Ops/sec
coping array using concat method	1806869.0 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