On Mon, Mar 12, 2018 at 11:06:11AM +0100, Julian Andres Klode wrote: > Hey folks, > > We had a coding day in Foundations last week and Balint and Julian added > support for zstd compression to dpkg [1] and apt [2]. > > [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=892664 > [2] https://salsa.debian.org/apt-team/apt/merge_requests/8 > > Zstd is a compression algorithm developed by Facebook that offers far > higher decompression speeds than xz or even gzip (at roughly constant > speed and memory usage across all levels), while offering 19 compression > levels ranging from roughly comparable to gzip in size (but much faster) > to 19, which is roughly comparable to xz -6: > > In our configuration, we run zstd at level 19. For bionic main amd64, > this causes a size increase of about 6%, from roughly 5.6 to 5.9 GB. > Installs speed up by about 10%, or, if eatmydata is involved, by up to > 40% - user time generally by about 50%. > > Our implementations for apt and dpkg support multiple frames as used by > pzstd, so packages can be compressed and decompressed in parallel > eventually.
More links: PPA: https://launchpad.net/~canonical-foundations/+archive/ubuntu/zstd-archive APT merge request: https://salsa.debian.org/apt-team/apt/merge_requests/8 dpkg patches: https://bugs.debian.org/892664 I'd also like to talk a bit more about libzstd itself: The package is currently in universe, but btrfs recently gained support for zstd, so we already have a copy in the kernel and we need to MIR it anyway for btrfs-progs. -- debian developer - deb.li/jak | jak-linux.org - free software dev ubuntu core developer i speak de, en -- ubuntu-devel mailing list ubuntu-devel@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel
