I am the -- vote, and I voted -- because there are several accurate answers and yours did not even meet the technical bar of knowing what the construct you want is called (reference), realizing that constructing code had already been posted (eg by me), or realizing that the person was asking about Perl's native sort function. (Indeed if you need to roll your own then you probably don't want to use a comparison function written in Perl!)

Had this been something like CMonks or PascalMonks I would have been voting ++, but it is not and so I didn't.

In reply to RE (tilly) -2: Dynamic sort algorithm selection by tilly
in thread Dynamic sort algorithm selection by Sentinel

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