MeasureThat.net

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

Go to the benchmark
Run details:
Mozilla/5.0 (X11; Linux x86_64; rv:104.0) Gecko/20100101 Firefox/104.0
Firefox 104
Linux
Desktop
2 years ago
Test name Executions per second
Array constructor - 10 items 10618749.0 Ops/sec
Array literal - 10 items 7666732.5 Ops/sec
Array literal (assign by index) - 10 items 8155525.5 Ops/sec
Array literal (explicit length) - 10 items 7131441.5 Ops/sec
Tests:

  • Array constructor - 10 items

    ​x
     
    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;
    }