This was an interesting post but comes off a bit frustrated and uses examples that are not "on point."

For example, you said: "is not really useful: one cannot paste it to a sub to make it work."

Perhaps I am confused but Perlmonks (or any other free, online resource by volunteers) is unlikely to do your job for you.

Second, and more importantly, have you ever heard of the phrase, "garbage in, garbage out?" If you ask a specific question -- one that is qualified with performance requirements like, "hey, the array in question will have 1 million elements" -- you are far more likely to get a detailed answer. Be specific.