#!/usr/bin/perl
use strict;
use warnings;

use Benchmark     qw( cmpthese );
use File::Slurper qw( read_text );
use Sort::Key     qw( rikeysort );


my @unsorted =
   split /^(?=>>> )/m,
      read_text( "try3.txt" );

@unsorted = ( @unsorted ) x 10_000; # 90_000 lines (30_000 records)


sub basic {
   my @sorted =
      sort {
         my ( $an ) = $a =~ /(\d+)%/;
         my ( $bn ) = $b =~ /(\d+)%/;
         $bn <=> $an
      }
         @unsorted;
}


sub ST {
   my @sorted =
      map $_->[0],
         sort { $b->[1] <=> $a->[1] }
            map [ $_, /(\d+)%/ ],
               @unsorted;
}


sub GRT {
   my @sorted =
       map substr( $_, 4 ),
          sort
             map {
                /(\d+)%/
                ? ( ~ pack( "N", $1 ) . $_ )
                : ()
             }
                @unsorted;
}


sub keysort {
   my @sorted = rikeysort { ( /(\d+)%/ )[0] } @unsorted;
}


cmpthese( -3, {
    basic   => \&basic,
    ST      => \&ST,
    GRT     => \&GRT,
    keysort => \&keysort,
} );