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

# 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 );

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".

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)
},
});

Algorithm::Diff, Algorithm::LCS.

Audrey Tang <cpan@audreyt.org>

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.