Script Preparation code:
x
 
var n = 10;
function Person(name, age) {
  this.name = name;
  this.age = age;
}
Tests:
  • Array constructor - 100000 items

     
    var arr = new Array(n);
    for (var i = 0; i < n; i++) {
      arr[i] = new Person(i + '', i);
    }
  • Array literal - 100000 items

     
    var arr = [];
    for (var i = 0; i < n; i++) {
      arr.push(new Person(i + '', i));
    } 
  • Array literal (assign by index) - 100000 items

     
    var arr = [];
    for (var i = 0; i < n; i++) {
      arr[i] = new Person(i + '', i);
    } 
  • Array literal (explicit length) - 100000 items

     
    var arr = [];
    arr.length = n;
    for (var i = 0; i < n; i++) {
      arr[i] = new Person(i + '', i);
    } 
Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Experimental features:

  • Test case name Result
    Array constructor - 100000 items
    Array literal - 100000 items
    Array literal (assign by index) - 100000 items
    Array literal (explicit length) - 100000 items

    Fastest: N/A

    Slowest: N/A

Latest run results:
Run details: (Test run date: 8 years ago)
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36
Chrome 53 on Mac OS X 10.12.0
View result in a separate tab
Test name Executions per second
Array constructor - 100000 items 346591.0 Ops/sec
Array literal - 100000 items 369011.3 Ops/sec
Array literal (assign by index) - 100000 items 393708.1 Ops/sec
Array literal (explicit length) - 100000 items 366800.1 Ops/sec