The best algorithm for high compression

[Wladmir]

What speed compression algorithm has close to 7-Zip compression level and near the paq8px?

[JangoFatXL]

generally I would say:

There is no "best algorithm". It depends on the kind of data you want to compress. If you want a complete compression suite using several of the strongest algos (note: i did NOT say THE BEST ALGORITHM), like LZMA, I would advise freearc ( http://freearc.org/ ).
Its author, Bulat, is very often also present here in this forum:

http://encode.dreamhosters.com/showt...p?t=43&page=57

You can find the very latest version here

http://freearc.org/download/testing/...lpha-win32.exe

See here for comparison to other compression progs ranked on efficiency:

http://www.maximumcompression.com/da...y_mf2.php#data

[Wladmir]

algorithm which is close to the speed and bzip2 compression level near the paq8px?

[mindi]

algorithm which is close to the speed and bzip2 compression level near the paq8px?

Your question is a bit stupid.
The most effective algorithms are not generally the fastest or the most powerful (the best compression ratio), and vice versa.

You can choose just about any compromise.
I think that the best criterion is the "compression time + (2x)transfer time + decompression time."

faster computer = prefer more powerful (slower) algorithms
faster transfer = prefer quicker (less powerful) algorithms

http://compressionratings.com/calc.c...ull.html&id=10

paq8px has extremely powerful compression ratio, but has damn slow speed.
Personally, I prefer "nanozip" (I regret that it is only in alpha release ).
Good compromise.

[Wladmir]

Resultado das compara??es

Arquivo usado: mssefullinstall-x86fre-pt-br-xp.exe

Programa Tamanho (bytes)

Nenhum 10.290.798
PKZIP 8.835.345
WinZIP 8.716.756
CABARC 8.635.825
WinRAR 8.623.192
7-Zip 8.593.904
FreeARC 8.559.853
UHARC 8.511.799
WinRK 8.507.796
NanoZIP 8.373.933

Algu?m sabe de algum algoritmo melhor que o NanoZIP que n?o seja derivado do paq?

[Wladmir]

Results of comparisons

File used: mssefullinstall-x86fre-en-XP.exe

Program Size (bytes)

None 10,290,798
PKZIP 8,835,345
WinZIP 8,716,756
CABARC 8,635,825
WinRAR 8,623,192
7-Zip 8,593,904
FreeARC 8,559,853
UHARC 8,511,799
WinRK 8,507,796
NanoZIP 8,373,933

Does anyone know of a better algorithm that NanoZIP that is not derived from paq?

[Piotr Tarsa]

Why you're compressing a compressed installer? It's better to unpack it first.

[Bulat Ziganshin]

nanozip -CO
winrk "best asymmetric"
rzm
freearc -mx/-m9x
7-zip

plus srep and precomp as preprocessors

[JangoFatXL]

hi Wladimir,

in my opinion, tests on an single and already compressed file, are not really representative... Try to test with a big set of data.