Furthermore pdiffs were introduced in ~2006: <a href="https:&#x2F;&#x2F;www.debian-administration.org&#x2F;article&#x2F;439&#x2F;Avoiding_slow_package_updates_with_package_diffs" rel="nofollow">https:&#x2F;&#x2F;www.debian-administration.org&#x2F;article&#x2F;439&#x2F;Avoiding_s...</a>