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Last step in JPEG compression is entropy coding, which is in essence very similar to what ZIP algorithm do: identify sub-strings that are more common and give them shorter coded sequences while less common sub-strings will be mapped to longer sequences. The length to use is computed based on how likely it is to see the substring in the complete file. The ...


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My idea was to find some hint in the file listing of the packages or in gconf, but I had no luck. Someone else knew the answer though. Superuser: Change default compression levels for file-roller? Either: $ dconf write /org/gnome/file-roller/general/compression-level "'maximum'" Or: $ dconf-editor Select org in the left-hand pane. ...


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See Will btrfs automatically compress existing files when compression is enabled? on best practices compressing with btrfs: The command is btrfs fi defrag not btrfs fi sync it must be applied to file, btrfs fi defrag /mnt/Emu/dummy.txt not to dir how exactly do you decide it is not compressed? df is not showing proper sizes.



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