ask the package server for zstd compressed data #4472
Merged
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Together with JuliaPackaging/PkgServer.jl#220 this allows Pkg to download registries, packages and artifacts as zst archives which based on benchmarks decompress significantly faster and also tend to be smaller.
Having the registry stored as a zst archive is not a backwards compatibility issue because even on older Pkgs it can decompress these with 7z