This has been delayed because of a) the need for a real-world example to diffuse the possibility of critisism for using an artifical example; b) the difficulty in actually making the translated code work.

Starting with the full solution to Re^4: Restore the original order of an array after sort and performing some funchtion on array values, and using a dataset size per Re^6: Restore the original order of an array after sort and performing some funchtion on array values,

this code 4000: Took 1.369 seconds:

Standard Perl:

Converted to use autobox::Core,

it requires 4000: Took 237.630 seconds:

(Partially) autoboxed code:

I get that to be a 99.5% slowdown.

Update: It was pointed out that the above figure is deceptive, in that what it shows is that the standard perl version took just 0.5% of the time that the autoboxed version took. Looked at the other way around, the autoboxed version took 17000% longer.