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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12) AppleWebKit/602.1.50 (KHTML, like Gecko) Version/10.0 Safari/602.1.50

Browser: Safari 10

Operating system: Mac OS X 10.12

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
Array constructor - 1000 items	428629.2 Ops/sec
Array literal - 1000 items	255101.6 Ops/sec
Array literal (assign by index) - 1000 items	255348.8 Ops/sec
Array literal (explicit length) - 1000 items	310050.1 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; }