Run results for: Array spread vs. push performance

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 12_4_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.1.2 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 12

Operating system: iOS 12.4.2

Device Platform: Mobile

Date tested: 4 years ago

Test name	Executions per second
Array.prototype.push	2381291.0 Ops/sec
Array.prototype.concat	6.6 Ops/sec
Array spread	5.7 Ops/sec

Script Preparation code:

var arr = [1, 1, 1, 1, 1];

Tests:

Array.prototype.push
arr.push(1);
Array.prototype.concat
arr.concat(1);
Array spread
[...arr, 1];

Run results for: Array spread vs. push performance

Array.prototype.push

Array.prototype.concat

Array spread