Run results for: Array constructor vs literal performance (10 items) - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36

Browser: Chrome 105

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Array constructor - 10 items	7088558.0 Ops/sec
Array literal - 10 items	29774670.0 Ops/sec
Array literal (assign by index) - 10 items	30330160.0 Ops/sec
Array literal (explicit length) - 10 items	9478335.0 Ops/sec

Website performance monitoring

Tests:

Array constructor - 10 items
var n = 10; var arr = new Array(n); for (var i = 0; i < n; i++) { arr[i] = i; }
Array literal - 10 items
var n = 10; var arr = []; for (var i = 0; i < n; i++) { arr.push(i); }
Array literal (assign by index) - 10 items
var n = 10; var arr = []; for (var i = 0; i < n; i++) { arr[i] = i; }
Array literal (explicit length) - 10 items
var n = 10; var arr = []; arr.length = n; for (var i = 0; i < n; i++) { arr[i] = i; }