<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/2.4.1/lodash.js"></script>
<script>
    var ar = [];
    for(z=0;z<500000;z++) {
        ar.push(Math.floor(Math.random()*10000));
    }
  
  function indexOfFor(ar,v){
    for (var i = 0,l=ar.length; i < l; i++) {
     if (ar[i] === v) {
        return i;
      }
    }
    return -1;
  }

  function indexOfForIn(ar,v){
    for (var i in ar) {
     if (ar.hasOwnProperty(i) && (ar[i] === v)) {
        return i;
      }
    }
    return -1;
  }
  
  function indexOfWhile(ar,v){
    var i=0,a;
    while (a=ar[i++]) {
     if (a === v) {
        return i-1;
      }
    }
    return -1;
  }
  
  function indexOf(ar,v){
    return ar.indexOf(v);
  }

  function lodashIndexOf(ar,v){
    return _.contains(ar,v);
  }

</script>

Setup JS

Teardown JS

Test cases

Test #1

Title *

Async

Code *var a = indexOfFor(ar,100);

Test #2

Title *

Async

Code *var a = indexOfWhile(ar,100);

Test #3

Title *

Async

Code *var a = indexOf(ar,100);

Test #4

Title *

Async

Code *var a = lodashIndexOf(ar,100);

Test #5

Title *

Async

Code *var a = indexOfForIn(ar, 100);

Test case details

Preparation Code

Test cases

Test #1

Test #2

Test #3

Test #4

Test #5