sean orourke rwqjlcsuclaedu marvin humphrey writes nov 10 2007 807 sean orourke wrote problem works 588 unimaginably slow blead regex engine insists copying target string preserve 1 way promise perl wont touch match target similar problem regexbased tokenizer maybe ought module something like maybe one already exists didnt see one maybe one could plugin regex engine still running matches across large immutable string without copying seems common useful look motifs chromosome count words book hard impossible support safe 1 still seems worth make possiblyunsafe workaround available checked changing regexecc2119 flags rexec_copy_str svreadonlysv fixes dont know implications might sean thu 07 aug 2008 065643 0800 possible avoid slowdown large mg