Array.prototype.move

JavaScript performance comparison

Revision 3 of this test case created by

Preparation code

<script>
  var array = { "first":"second",
  "arny":"third",
  "joe":"blow",
  "firsty":"thirsty"
};
  
  function move(pos1, pos2) {
    // local variables
    var i, tmp;
    // cast input parameters to integers
    pos1 = parseInt(pos1, 10);
    pos2 = parseInt(pos2, 10);
    // if positions are different and inside array
    if (pos1 !== pos2 && 0 <= pos1 && pos1 <= this.length && 0 <= pos2 && pos2 <= this.length) {
      // save element from position 1
      tmp = this[pos1];
      // move element down and shift other elements up
      if (pos1 < pos2) {
        for (i = pos1; i < pos2; i++) {
          this[i] = this[i + 1];
        }
      }
      // move element up and shift other elements down
      else {
        for (i = pos1; i > pos2; i--) {
          this[i] = this[i - 1];
        }
      }
      // put element from position 1 to destination
      this[pos2] = tmp;
    }
  }

</script>
    

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
move1
move.apply(array,["2","1"]);
move.apply(array,["0","1"]);
pending…

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