Run results for: Array constructor vs literal performance (10_000 items)

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Array literal (explicit length) - 10 items

71K/s

Array constructor - 10_000 items

67K/s

Array literal - 10_000 items

37K/s

Array literal (assign by index) - 10_000 items

31K/s

View exact numbers

Test name	Executions per second
✓ Array literal (explicit length) - 10 items	71,400 Ops/sec
Array constructor - 10_000 items	67,336 Ops/sec
Array literal - 10_000 items	36,783 Ops/sec
Array literal (assign by index) - 10_000 items	31,192 Ops/sec

Tests:

Array constructor - 10_000 items
var n = 10_000; var arr = new Array(n); for (var i = 0; i < n; i++) { arr[i] = i; }
Array literal - 10_000 items
var n = 10_000; var arr = []; for (var i = 0; i < n; i++) { arr.push(i); }
Array literal (assign by index) - 10_000 items
var n = 10_000; var arr = []; for (var i = 0; i < n; i++) { arr[i] = i; }
Array literal (explicit length) - 10 items
var n = 10_000; var arr = []; arr.length = n; for (var i = 0; i < n; i++) { arr[i] = i; }