Run results for: Array Map alternatives

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0

Browser: Firefox 57

Operating system: Windows

Device Platform: Other

Date tested: 2025 years ago

Test name	Executions per second
For loop bracket notation	117478.0 Ops/sec
Map new notation	177859.0 Ops/sec
Map old notation	145068.4 Ops/sec
For loop push	120780.9 Ops/sec

Tests:

For loop bracket notation
var array1 = [1, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16], map1 = [], arrayLength = array1.length; for (var i = 0; i < arrayLength; i++) { map1[i] = array1[i] * 2; }
Map new notation
var array1 = [1, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16]; var map1 = array1.map(x => x * 2);
Map old notation
var array1 = [1, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16]; var map1 = array1.map(function (x) {return x * 2});
For loop push
var array1 = [1, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16, 4, 9, 16], map1 = [], arrayLength = array1.length; for (var i = 0; i < arrayLength; i++) { map1.push(array1[i] * 2); }

Run results for: Array Map alternatives

For loop bracket notation

Map new notation

Map old notation

For loop push