I'm not entirely sure why the regexes were so much slower, unless they just never could actually match. In that circumstance, /.*FAIL/ would be a lot slower than /^.*FAIL/.
_____________________________________________________
Jeff japhy Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and perl hacker
How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart

In reply to Re^3: The Deceiver by japhy
in thread Why does a Perl 5.6 regex run a lot slower on Perl 5.8? by perldeveloper

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