MeasureThat.net

Run results for: Array constructor vs literal

Go to the benchmark
Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:108.0) Gecko/20100101 Firefox/108.0
Firefox 108
Mac OS X 10.15
Desktop
2 years ago
Test name Executions per second
Array constructor - 1000 items 280621.0 Ops/sec
Array literal - 1000 items 193739.6 Ops/sec
Array literal index - 1000 items 200633.9 Ops/sec
Tests:

  • Array constructor - 1000 items

    ​x
     
    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 index - 1000 items

     
    var n = 1000;
    var arr = [];
    ​
    for (var i = 0; i < n; i++) {
      arr[i] = i;
    }