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         Rate inssub regmap  regex fixreg substr
inssub 13.7/s     --   -95%   -97%   -97%   -97%
...
regex   395/s  2784%    52%     --    -1%   -20%
fixreg  398/s  2809%    53%     1%     --   -19%
substr  491/s  3483%    89%    24%    23%     --

use Benchmark;
 
...
 }, 'none');
 
Benchmark::cmpthese($result);