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#!/usr/bin/perl
use strict; use warnings;
...
       idiom(\%h)
       },
});

Results:
            Rate    Idiom  Verbose Verbose4 Verbose3 Verbose2
...
Verbose4 16029/s      12%       2%       --      -1%      -1%
Verbose3 16129/s      13%       3%       1%       --      -0%
Verbose2 16151/s      13%       3%       1%       0%       --