For/While Loop vs indexOf (v208)

Revision 208 of this benchmark created by Darren on

Description

compare assosciative array approach

Preparation HTML

<script>
    var ar = [1, 2, 3, 4, 5, 6, 7, 8, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9, 9, 2, 3, 4, 5, 6, 7, 8, 9];

var aa = {}
ar.forEach(function (v) {
 aa[v] = 1;
});
  
  
  function indexOfFor(ar,v){
    for (var i = 0,l=ar.length; i < l; i++) {
     if (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 indexerCheck(aa, v) {
    return aa[v]
  }
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
For loop
var a = indexOfFor(ar,40);
ready
While Loop
var a = indexOfWhile(ar,40);
ready
indexOf
var a = indexOf(ar,40);
ready
object indexer
var a = indexerCheck(40);
ready

Revisions

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