### Algorithm::Diff::XS (3)

#### Leading comments

Automatically generated by Pod::Man 4.09 (Pod::Simple 3.35) Standard preamble: ========================================================================

#### NAME

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

#### SYNOPSIS

# Drop-in replacement to Algorithm::Diff, but "compact_diff"

# and C

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

#### COPYRIGHT

Copyright 2008 by Audrey Tang

Contains derived code copyrighted 2003 by Joe Schaefer,

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