JS: For loop vs Array.indexOf (v233)

Revision 233 of this benchmark created by tsjondin on

Description

Testing speed of a standard for loop vs. Array.indexOf vs. inverse for loop vs. while loop vs. for with cached length.

Checking for 5000 in a 10000 index array for equal opportunity inverse.

Preparation HTML

<script>
  var ar = [];
  for (var i = 0; i < 10000; i++){
    ar.push(i);
  }
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
For loop
for (var i = 0; i < ar.length; i++) {
 if (ar[i] === 5000) {
  break;
 }
}
ready
indexOf
var a = ar.indexOf(5000);
ready
inverse for-loop
for (var i = ar.length; i--;) {
 if (ar[i] === 5000) {
  break;
 }
}
ready
while loop
var i = 0, l = ar.length;
while (i < l) {
 if (ar[i] === 5000) {
  break;
 }
 i++;
}
ready
For loop cached
var l = ar.length;
for (var i = 0; i < ar.length; i++) {
 if (ar[i] === 5000) {
  break;
 }
}
ready

Revisions

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