The compression algorithm
zstd brings faster compression and decompression, while maintaining a compression ratio comparable with
xz. This will speed up package installation with
pacman, without further drawbacks.
The imminent release of pacman 5.2 brings build tools with support for compressing packages with
zstd. To install these packages you need
libarchive with support for
zstd, which entered the repositories in September 2018. In order for
zstd compressed packages to be distributed, we require all users to have updated to at least libarchive 3.3.3-1. You have had a year, so we expect you already did update. Hurry up if you have not.
If you use custom scripts make sure these do not rely on hardcoded file extensions. The
zstd package file extension will be