Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36
Chrome 80
Mac OS X 10.15.3
Desktop
4 years ago
Test name Executions per second
Just instantiate new array 14433.7 Ops/sec
Set length to zero 16125.2 Ops/sec
Splice 14064.9 Ops/sec
Pop all values 9899.8 Ops/sec
Tests:
  • Just instantiate new array

    x
     
    var size = 10000;
    var arr1 = [];
    for (var i = 0; i < size; i++){
      arr1.push(i);
    }
    arr1 = [];
  • Set length to zero

     
    var size = 10000;
    var arr2 = [];
    for (var i = 0; i < size; i++){
      arr2.push(i);
    }
    arr2.length = 0;
  • Splice

     
    var size = 10000;
    var arr3 = [];
    for (var i = 0; i < size; i++){
      arr3.push(i);
    }
    arr3.splice(0, arr3.length);
  • Pop all values

     
    var size = 10000;
    var arr4 = [];
    for (var i = 0; i < size; i++){
      arr4.push(i);
    }
    while(arr4.length > 0){
      arr4.pop();
    }