in reply to Dreaming in Perl

To answer your question, the first and third will probably be about the same speed. The second will be significantly slower (lots of memory), and the fourth will be obscenly complicated. If it's much slower or about the same (or even faster!) depends mostly on how (explicitly) parallel your brain is.

theorbtwo can't sleep either, but wasn't dreaming of code... as far as he remembers.

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