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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.109 Safari/537.36 OPR/84.0.4316.31

Browser: Opera 84

Operating system: Mac OS X 10.13.6

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Array constructor - 10 items	3438457.0 Ops/sec
Array literal - 10 items	19897080.0 Ops/sec
Array literal (assign by index) - 10 items	16776630.0 Ops/sec
Array literal (explicit length) - 10 items	3490639.0 Ops/sec

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; }

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

Array constructor - 10 items

Array literal - 10 items

Array literal (assign by index) - 10 items

Array literal (explicit length) - 10 items