JS: For loop vs Array.indexOf (v272)

Revision 272 of this benchmark created by Enzo on

Description

Testing speed of a standard for loop vs. Array.indexOf.

Preparation HTML

<script>

var indexOf = function(arr, tosearch) {

        for (var i=0, t=arr.length; i<t; i++)
                if (arr[i] === tosearch)
                        return i;

        return -1;

};
  var ar = [];
for(var i = 99999; i--;){
ar.push({});
}
var tosearch = ar[99990];
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
For loop
for (var i = 0; i < ar.length; i++) {
 if (ar[i] === tosearch) {
  break;
 }
}
ready
other for-loop
for (var i = 0, n = ar.length; i < n; i++) {
 if (ar[i] === tosearch) {
  break;
 }
}
ready
indexOf
var a = ar.indexOf(tosearch);
ready
custom indexOf
var a = indexOf(ar, tosearch);
ready

Revisions

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