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use strict;
use warnings;
...
__DATA__
This string contains foo and bar for fools and bards
and I pity the foo who bars the way

               Rate alternation         map        loop
alternation 26962/s          --        -61%        -64%
...
          Rate  alt_s loop_s
alt_s  32434/s     --   -20%
loop_s 40707/s    26%     --

               Rate alternation        loop         map
alternation 26569/s          --        -56%        -60%
...
          Rate  alt_s loop_s
alt_s  31355/s     --   -19%
loop_s 38857/s    24%     --