Details
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Suggestion
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Resolution: Unresolved
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Not Evaluated
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None
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6.9
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None
Description
Since the attempt at insertion of a backdoor into LZMA/xz earlier this year, some Linux distributions and others have begun deprecating this project, due to lack of serious maintainership. For example, openSUSE and Fedora compress their RPM payloads and kernel modules with Zstandard; Clear Linux does the same for the kernel modules.
I suggest switching Qt .tar packages to be compressed with zstd too, even though they don't (yet) compress as much as xz. However, the Qt packages don't appear to be compressed using the best xz compression either... (looks like the default, -6).
Comparison of the source for qtbase 6.8.0 (compare to https://download.qt.io/official_releases/qt/6.8/6.8.0/submodules/qtbase-everywhere-src-6.8.0.tar.xz)
| Compression | Size (MB) | Time to compress (CPU sec) | Time to decompress |
|---|---|---|---|
| None | 253 | N/A | 0.03 |
| zstd -19 | 48.4 | 103.47 | 0.169 |
| zstd -19 --long | 46.5 | 126.54 | 0.214 |
| zstd -22 --ultra | 45.9 | 131.78 | 0.226 |
| zstd -22 --ultra --long | 45.9 | 136.88 | 0.221 |
| xz -6 | 47.6 | 133.75 | 0.454 |
| xz -9 | 46.3 | 89.6 | 1.087 |
| xz -9e | 45.9 | 114.89 | 1.091 |
Attachments
Issue Links
- relates to
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QTIFW-2870 Study if other archive format is faster
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- Closed
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- mentioned in
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