Run results for: Array constructor vs literal performance - 1000 items

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:140.0) Gecko/20100101 Firefox/140.0

Browser: Firefox 140

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Array literal - 1000 items

576K/s

Array constructor - 1000 items

503K/s

Array literal (explicit length) - 1000 items

457K/s

Array literal (assign by index) - 1000 items

457K/s

View exact numbers

Test name	Executions per second
✓ Array literal - 1000 items	576,286 Ops/sec
Array constructor - 1000 items	502,700 Ops/sec
Array literal (explicit length) - 1000 items	457,338 Ops/sec
Array literal (assign by index) - 1000 items	456,635 Ops/sec

Tests:

Array constructor - 1000 items
var n = 1000; var arr = new Array(n); for (var i = 0; i < n; i++) { arr[i] = i; }
Array literal - 1000 items
var n = 1000; var arr = []; for (var i = 0; i < n; i++) { arr.push(i); }
Array literal (assign by index) - 1000 items
var n = 1000; var arr = []; for (var i = 0; i < n; i++) { arr[i] = i; }
Array literal (explicit length) - 1000 items
var n = 1000; var arr = []; arr.length = n; for (var i = 0; i < n; i++) { arr[i] = i; }