JS: For loop vs Array.indexOf (v116)

Revision 116 of this benchmark created by imma on

Description

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

Preparation HTML

<script>
var ar = [];
for (var i=0; i<10000; i++) {
  ar.push(Math.random()+5*Math.random());
  if (i==4999) ar.push(5); }

function iOf(arr, item) {
  for(var l=arr.length, n=0; n<l; n++)
    if(arr[n] === item) return n;
  return -1; }
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
For loop
var a=-1;
for (var i = 0; i < ar.length; i++) {
 if (ar[i] === 5) {
  a = i;
  break; } }
ready
other for-loop
var a=-1;
for (var i = 0, n = ar.length; i < n; i++) {
 if (ar[i] === 5) {
  a = i;
  break; } }
ready
indexOf
var a = ar.indexOf(5);
ready
custom function
var a = iOf(ar, 5);
ready

Revisions

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