[Zlib-devel] zlib compression ratio

[Mark Adler]

On Sep 18, 2006, at 3:03 AM, Ralf Junker wrote:
> I noticed that 7-zip achieves about 7 to 8 percent better  
> compression for *.ZIP files than most deflate algorithms, including  
> zlib
...
> What kind of magic does 7-zip use? Couldn't zlib's deflate be  
> imporived to achieve similar ratios?

Yes, it could.  However that's lower on my priority list than, for  
example, incorporating a better compression method like LZMA2.

By the way, I heard from Jean-loup for the first time in about a  
year!  He's getting a job at Google and he might have some time to  
contribute to gzip and zlib.  Perhaps he could work on deflate ...

mark