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libalgorithm-diff-xs-perl_0.04-4build1_amd64 **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.