>If, as your comment suggests, you really know exactly what's in your >string, what are you using PCRE to try to find? Perhaps there's another >way of solving the problem.
Wouldn't DFA be using less stack in this case?
Or make by unrolling, wouldn't
(P1(P[249]P[249]P[249]P[249]P[249]P[249]P[249]P[249]P[249]P[249])+(P[249]){0,9})
use roughly 10 time less recursion?
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