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#!/usr/bin/perl -w

...
    qreg  => sub{ $txt =~ $rgx },
   },
  );

% test.pl
Benchmark: timing 1000000 iterations of match, qreg...
     match:  1 wallclock secs ( 0.82 usr +  0.00 sys =  0.82 CPU) @ 12
+19512.20/s (n=1000000)
      qreg:  0 wallclock secs ( 0.73 usr +  0.00 sys =  0.73 CPU) @ 13
+69863.01/s (n=1000000)