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use warnings;
use strict;
...
}

__END__

karls-mac-mini:monks karl$ ./benchzip.pl 
         Rate    B Karl    A    C
...
Karl 118153/s  20%   -- -33% -62%
A    176987/s  79%  50%   -- -43%
C    312785/s 217% 165%  77%   --