release: compress linux/darwin archives with xz -9e (smaller downloads) - #4162
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…ptimal on windows The linux and darwin release archives were plain gzip (level 6) tarballs at ~85 MB each. Switch them to xz -9e, which shrinks a stripped skywire binary's archive by ~13-14% vs gzip with no other change: gzip -6 (old): 89.5 MB xz -9e: 77.3 MB (-13.6%) zstd -19: 80.3 MB (-10.3%) xz -9e wins on ratio and its decompressor is near-universal, so it is preferred over zstd here. The tar is piped through the xz CLI (not tar -J) so the -9e level is honored identically on GNU tar (linux) and bsdtar (macOS). xz-utils is added to the linux job deps. The .sha256 sidecars, artifact globs and release upload lists move to the new .tar.xz extension. Windows Compress-Archive is raised to -CompressionLevel Optimal (smaller win, no new tooling). The rolling develop-latest/master-latest .zst binary-updater channel (publish-binary.yml) and the wasm-visor tinygo module archive are unchanged.
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The linux and darwin release archives are plain gzip (level 6) tarballs, ~85 MB each. Switching them to
xz -9eshrinks a strippedskywirebinary's archive by ~13-14% vs gzip, with no other change:xz -9ewins on ratio and its decompressor is near-universal, so it's preferred over zstd here. The tar is piped through thexzCLI (rather thantar -J) so the-9elevel is applied identically on GNU tar (linux) and bsdtar (macOS);xz-utilsis added to the linux job deps. The.sha256sidecars, artifact globs and release-upload file lists move to.tar.xz. WindowsCompress-Archiveis raised to-CompressionLevel Optimal(smaller win, no new tooling).Consumer of the archives — the AUR
skywire-binPKGBUILD — is updated in the AUR repo separately. The rollingdevelop-latest/master-latest.zstbinary-updater channel (publish-binary.yml) and the wasm-visor tinygo module archive are intentionally left unchanged.Extension change (
.tar.gz->.tar.xz) applies only tov*tagged releases, which is the only thing release.yml runs for.