Mail Archives: djgpp/1996/11/10/20:26:40
On Sun, 10 Nov 1996, Malcolm Taylor wrote:
[...]
> RAR only tracks around 64K of data, try using WinRAR2.0 with a 1M
> dictionary and you'll get much better ratios - eg. I compressed all the
> DJGPP exes in my Bin dir with PKzip and got 4008690byte zip, with
> WinRAR2.0 it goes down to 2483578. RKIVE gets 2022798 (with some
> extra options). This is close to half the size with PKzip, and that
> situation may well improve on the source zips. Note that RAR with a
> 1M dictionary is slower than RKIVE though.
> I wrote RKIVE so I'm a little biased, but compared with zip it is
> slow. It does use some fairly sofisticated algorithms, actually
> modern variants of PPM (PPMZ) and some modified string matching. ACB
> is about the best known archiver (in compression terms) but it is
> best run on a Pentium as it is around 2x slower than RKIVE. JAR is a
> new archiver (still in beta) by the author of ARJ. It has better
> compression than RAR and is faster.
[...]
One question: is the source code for ANY of these slam-bang new archivers
available? I use UNIX most of the time, and I'm concerned about
compatibility because most everyone under UNIX uses GZIP or COMPRESS. One
good thing though is that you don't have *much* of a memory problem with
"typical" UNIX workstations.
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