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    SubjectRe: Linux Kernel Source Compression

    > bzip1 uses arithmetic encoding which is heavily patented. bzip2 uses
    > huffman instead, which isn't, but is slightly (10% is often quoted)
    > less efficient.

    It uses an adaptive huffman scheme devised by David Wheeler, which usually
    gets within 1% of the arithmetic coder that bzip1 used.

    bzip2, especially the 1.0.X series, is superior to bzip1 in terms of speed,
    memory use, robustness against bad-case inputs, recoverability of data
    from damaged compressed streams, and that it can be used as a library.
    Moving back to bzip1 would IMO be a big step backwards.

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