Since PPMZ uses a lot of memory/CPU its hard to evaluate it on the debian
source packages. Instead it has been evaluated on 29 randomly picked
(source) packages.

					Size:
FILE:					Tar		PPMd	PPMZ   PPMonstr
libnet-ipnetmember-perl_1.00.orig.tar	30720		5029	5078
popularity-contest_1.3-1.1.tar		51200		9330	9421
liblogfile-rotate-perl_1.04.orig.tar	81920		10254	10120	9660
libroxen-popdrop_1.9.orig.tar		51200		10517	10698
galrey_0.5.4-3.tar			81920		16032	16409
xonix-jahu_1.1.orig			112640		23328	24059
slrnface_2.1.1.orig.tar			102400		23350	23989
chase_0.5.orig.tar			133120		27371	28137
ctklight_0.22.2.orig.tar		153600		30907	31846
libhtml-clean-perl_0.8.orig.tar		204800		37108	38223
lib3ds_1.2.0.orig.tar			788480		93063	97185
devmapper_0.96.07.orig.tar		768000		96455	96595
waili_19990723.orig.tar			665600		103438	107891
cweb_3.64.orig.tar			737280		137835	142537
dvipdfm_0.13.2c.orig.tar		921600		145656	152236
gnome-objc_1.0.40.orig.tar		1648640		166359	169168
hwdata_0.64.orig.tar			911360		168677	174532
axyftp_0.5.1.orig.tar			2529280		188027	183509	170732
m4_1.4.orig.tar				1239040		211226	220963
zsh30_3.0.8.orig.tar			2375680		437417	457820
chasen_2.2.9.orig.tar			1505280		475422	476336
manpages-fr_0.9.7.orig.tar		5560320		608556	636652
unzip_5.50.orig.tar			4751360		630058	650473
postfix-snap_1.1.11-20021115.orig.tar	6062080		676614	N/A
youbin_3.4.orig.tar			1310720		864727	846722	836893
lg-issue18_6.orig.tar			2877440		1318292 1297317	1287244
scalapack_1.7.orig.tar			31938560	1369437	N/A
torch_2.orig.tar.ppmz			4567040		1675610	1661365	1616614
isdnutils_3.2pre1.orig			15667200	4589378 N/A

PPMZ is indeed very good. It ain't easy to find a compressor that matches so
evenly with PPMd as PPMZ.

PPMd = PPMd -o16 -m220
PPMZ = ppmz -b
PPMonstr = PPMonster.exe -o16 -m220
N/A = PPMZ can't compress the file in reasonable time using reasonable amounts
      of memory.

PPMonster is an unfree version of PPMd “with time consuming extras”, that has
been removed from the Debian source package to avoid main/non-free mixing
problems. Its available from: <ftp://ftp.elf.stuba.sk/pub/pc/pack>

PPMd: 24 wins vs 5 wins for PPMZ.
PPMonster: 29 wins vs 0 wins for PPMZ
