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Just as quickly? Looks like (surprisingly, to me at least) ~9-10% faster on average.

use Benchmark qw( timethese cmpthese ); use List::Util qw( shuffle ); for my $max (qw( 100 200 500 1000 2000 5000 )) { print "results for $max elems\n"; my @big_list = shuffle 1 .. $max; cmpthese( -1, { plain_sort => sub { my @local = sort { $b <=> $a } @big_list; }, reversed => sub { my @local = reverse sort { $a <=> $b } @big_list; }, } ); print "\n"; } exit 0; __END__ results for 100 elems               Rate plain_sort   reversed plain_sort 46849/s         --        -8% reversed   50717/s         8%         -- results for 200 elems               Rate plain_sort   reversed plain_sort 20676/s         --       -12% reversed   23424/s        13%         -- results for 500 elems              Rate plain_sort   reversed plain_sort 7657/s         --        -9% reversed   8374/s         9%         -- results for 1000 elems              Rate plain_sort   reversed plain_sort 3490/s         --        -8% reversed   3794/s         9%         -- results for 2000 elems              Rate plain_sort   reversed plain_sort 1599/s         --        -9% reversed   1756/s        10%         -- results for 5000 elems             Rate plain_sort   reversed plain_sort 553/s         --       -10% reversed   613/s        11%         --

This space reserved for the update when someone points out my obvious benchmark fau pas . . . :)

The cake is a lie.
The cake is a lie.
The cake is a lie.


In reply to Re^3: Predefined Sort by Fletch
in thread Predefined Sort by k_grdn

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