I'm too lazy to benchmark, but since I know for(;;) is implemented in terms of while(){} continue{} and am fairly certain the list for the foreach is generated lazily in Perl5 (and thus juggling memory is not an issue), I'll hazard a guess that #3 should be the be the fastest of the lot.

FWIW, I don't remember ever dreaming of code. Then again, I rarely ever remember anything but the worst of anxiety ridden dreams, so I may well have. Who knows?

Makeshifts last the longest.