PowerArchiver includes exclusive Advanced Codec Pack (.PA), which is most comprehensive compression format today. It includes many different filters and codecs that work transparently to create best possible compression/speed ratio for your files. Smart Optimized modes select the best compression/speed ratios on per-file basis, increasing compression rate and speed. In one compression scenario, PowerArchiver can use multiple codecs for different files/extensions! This provides much better compression/speed since we can target codecs better.