Why? As already shown there are many ways of hiding a loop, but unless we know why you want to do this strange thing it's not clear that any of the subterfuges mentioned above will be of any use to you.

If you are concerned with efficiency, don't be (this is Perl and it ain't built for that) or use XS (a module written in C) to perform the time critical part. An existing module such as PDL may be able to do the heavy lifting for you.