Run results for: Array concat speed

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.1 Safari/605.1.15

Browser: Safari 15

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Array.prototype.concat	6634676.5 Ops/sec
spread operator	172887280.0 Ops/sec
Push	902485.1 Ops/sec
Object assign	141654.3 Ops/sec
For loop	2030185.8 Ops/sec

Tests:

Array.prototype.concat
var testArray = [29, 27, 28, 838, 22, 2882, 2, 93, 84, 74, 7, 933, 3754, 3874, 22838, 38464, 3837, 82424, 2927, 2625, 63, 27, 28, 838, 22, 2882, 2, 93, 84, 74, 7, 933, 3754, 3874, 22838, 38464, 3837, 82424, 2927, 2625, 63, 27, 28, 838, 22, 2882, 2, 93, 84, 74, 7, 933, 3754, 3874, 22838, 38464, 3837, 82424, 2927, 2625, 63, 27, 28, 838, 22, 2882, 2, 93, 84, 74, 7, 933, 3754, 3874, 22838, 38464, 3837, 82424, 2927, 2625, 63]; var other = [].concat(testArray);
spread operator
var testArray = [29, 27, 28, 838, 22, 2882, 2, 93, 84, 74, 7, 933, 3754, 3874, 22838, 38464, 3837, 82424, 2927, 2625, 63, 27, 28, 838, 22, 2882, 2, 93, 84, 74, 7, 933, 3754, 3874, 22838, 38464, 3837, 82424, 2927, 2625, 63, 27, 28, 838, 22, 2882, 2, 93, 84, 74, 7, 933, 3754, 3874, 22838, 38464, 3837, 82424, 2927, 2625, 63, 27, 28, 838, 22, 2882, 2, 93, 84, 74, 7, 933, 3754, 3874, 22838, 38464, 3837, 82424, 2927, 2625, 63]; var other = [ ...testArray ]
Push
var testArray = [29, 27, 28, 838, 22, 2882, 2, 93, 84, 74, 7, 933, 3754, 3874, 22838, 38464, 3837, 82424, 2927, 2625, 63, 27, 28, 838, 22, 2882, 2, 93, 84, 74, 7, 933, 3754, 3874, 22838, 38464, 3837, 82424, 2927, 2625, 63, 27, 28, 838, 22, 2882, 2, 93, 84, 74, 7, 933, 3754, 3874, 22838, 38464, 3837, 82424, 2927, 2625, 63, 27, 28, 838, 22, 2882, 2, 93, 84, 74, 7, 933, 3754, 3874, 22838, 38464, 3837, 82424, 2927, 2625, 63]; var other = [].push(...testArray);
Object assign
var testArray = [29, 27, 28, 838, 22, 2882, 2, 93, 84, 74, 7, 933, 3754, 3874, 22838, 38464, 3837, 82424, 2927, 2625, 63, 27, 28, 838, 22, 2882, 2, 93, 84, 74, 7, 933, 3754, 3874, 22838, 38464, 3837, 82424, 2927, 2625, 63, 27, 28, 838, 22, 2882, 2, 93, 84, 74, 7, 933, 3754, 3874, 22838, 38464, 3837, 82424, 2927, 2625, 63, 27, 28, 838, 22, 2882, 2, 93, 84, 74, 7, 933, 3754, 3874, 22838, 38464, 3837, 82424, 2927, 2625, 63]; var other = Object.assign([], testArray);
For loop
var testArray = [29, 27, 28, 838, 22, 2882, 2, 93, 84, 74, 7, 933, 3754, 3874, 22838, 38464, 3837, 82424, 2927, 2625, 63, 27, 28, 838, 22, 2882, 2, 93, 84, 74, 7, 933, 3754, 3874, 22838, 38464, 3837, 82424, 2927, 2625, 63, 27, 28, 838, 22, 2882, 2, 93, 84, 74, 7, 933, 3754, 3874, 22838, 38464, 3837, 82424, 2927, 2625, 63, 27, 28, 838, 22, 2882, 2, 93, 84, 74, 7, 933, 3754, 3874, 22838, 38464, 3837, 82424, 2927, 2625, 63]; var other = [] for (let i = 0; i < testArray.length; i++){ other.push(testArray[i]) }

Run results for: Array concat speed

Array.prototype.concat

spread operator

Push

Object assign

For loop