Timothy Beryl Grahek wrote:
You can look at the output of -lv. If the dictionary size is smaller
than the uncompressed size, then the file can be compressed more.
What you suggested is extremely helpful. I thought I would point out,
though, that the dictionary size goes up to 32 MiB and then goes no
larger; I figure that indicates maximum compression level, but such an
observation is in contrast to what you've stated, so I thought I would
mention it.
You can find in the lzip manual[1] the dictionary size limit used by
each compression level. 32 MiB corresponds to level -9. You can use
larger dictionary sizes with the option '--dictionary-size', but it is
not recommended because generally the increase in compression is small
and the resulting file may be difficult to decompress on systems with
little RAM.
[1] http://www.nongnu.org/lzip/manual/lzip_manual.html#Invoking-lzip
Best regards,
Antonio.
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