Aoife Moloney wrote:
> The zstd compression type was chosen to match createrepo_c settings.
> As an alternative, we might want to choose xz,
Since xz consistently compresses better than zstd, I would strongly suggest
using xz everywhere to minimize download sizes. However:
> especially after zlib-ng has been made the default in Fedora and brought
> performance improvements.
zlib-ng is for gz, not xz, and gz is fast, but compresses extremely poorly
(which is mostly due to the format, so, while some implementations manage to
do better than others at the expense of more compression time, there is a
limit to how well they can do and it is nowhere near xz or even zstd) and
should hence never be used at all.
Kevin Kofler
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