For or while (v5)

Revision 5 of this benchmark created by x on

Preparation HTML

<script>
  var foo = [1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,1, 2, 3,];
  var cnt = 0;
  
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
for
for (var i = 0; i < foo.length; i++) {
  cnt++;
}
 
ready
while
var i = foo.length;
while (i--) {
  cnt++;
}
 
ready
reverse for
for (var i = foo.length; i--;) {
  cnt++;
}
 
ready
while bigger than zero
var i = foo.length;
while (i-- > 0) {
  cnt++;
}
 
ready
for with cached length
for (var i = 0, len=foo.length; i < len; i++) {
  cnt++;
}
ready
for cached outside loop
var len=foo.length;
for (var i = 0; i < len; i++) {
  cnt++;
}
ready
for in
for (i in foo) {
  cnt++;
}
ready

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.