NAME

       Algorithm::Diff::XS - Algorithm::Diff with XS core loop

SYNOPSIS

           # Drop-in replacement to Algorithm::Diff, but "compact_diff"
           # and C<LCSidx> will run much faster for large data sets.
           use Algorithm::Diff::XS qw( compact_diff LCSidx );

DESCRIPTION

       This module is a simple re-packaging of Joe Schaefer's excellent but not very well-known
       Algorithm::LCS with a drop-in interface that simply re-uses the installed version of the
       Algorithm::Diff module.

       Note that only the "LCSidx" function is optimized in XS at the moment, which means only
       "compact_diff" will get significantly faster for large data sets, while "diff" and "sdiff"
       will run in identical speed as "Algorithm::Diff".

BENCHMARK

                             Rate     Algorithm::Diff Algorithm::Diff::XS
       Algorithm::Diff     14.7/s                  --                -98%
       Algorithm::Diff::XS  806/s               5402%                  --

       The benchmarking script is as below:

           my @data = ([qw/a b d/ x 50], [qw/b a d c/ x 50]);
           cmpthese( 500, {
               'Algorithm::Diff' => sub {
                   Algorithm::Diff::compact_diff(@data)
               },
               'Algorithm::Diff::XS' => sub {
                   Algorithm::Diff::XS::compact_diff(@data)
               },
           });

SEE ALSO

       Algorithm::Diff, Algorithm::LCS.

AUTHORS

       Audrey Tang <cpan@audreyt.org>

COPYRIGHT

       Copyright 2008 by Audrey Tang <cpan@audreyt.org>.

       Contains derived code copyrighted 2003 by Joe Schaefer, <joe+cpan@sunstarsys.com>.

       This library is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.