Re: [Lzip-bug] Feature Request/Question - Compression Level Information

[Timothy Beryl Grahek]

Hi Antonio,

> 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.

To speak of, the files I am compressing are 16 GB or larger disk images 
for my work. So that is how I am using such an outrageous size to test 
with. Nevertheless, I could distinguish accurately between those images 
that were compressed with level 0 and those that were compressed with 
level 9 by the fact that the former had 64 KiB and the latter had 32 MiB 
for their respective dictionary sizes. So it is extremely useful to see 
the dictionary size output no matter what. Accordingly, it isn't 
strictly necessary to indicate further the differences in compression 
levels, at least for my personal and professional use cases.

If you would like evidence of what I am stating, I can provide it with 
no problem at all.

Best regards,

Timothy Beryl Grahek