7-Zip 9.11 beta

7-Zip 9.11 beta was released.

7-Zip for 32-bit Windows:

http://downloads.sourceforge.net/sevenzip/7z911.exe

7-Zip for 64-bit Windows x64:

http://downloads.sourceforge.net/sevenzip/7z911-x64.msi

What's new:

- 7-Zip now supports PPMd compression in .ZIP archives.
- Speed optimizations in PPMd codec.
- The support for archives in installers was improved.
- Some bugs were fixed.
- New localization: Kazakh.

Additional infomation about PPMD in ZIP.

Command line to compress with ppmd in zip:

  7z a a.zip -mm=ppmd -mmem=64m -mo=10

-mo={N} Order (word size) (2-16)
-mmem={N} Memory usage (1m-256m)

Default values for different -mx switches:
-mx1:  -mmem=1m -mo=4
-mx3:  -mmem=4m -mo=6
-mx5:  -mmem=16m -mo=8
-mx7:  -mmem=64m -mo=10
-mx9:  -mmem=128m -mo=16

To compare compression/decompression time of 7-Zip 9.10 / 9.11 you can use timer.exe from:
http://downloads.sourceforge.net/sevenmax/7bench903.zip

timer 7z a a.7z -m0=ppmd bigfile >> a.txt
timer 7z t a.7z >> a.txt

Please write here you results, including information about CPU.

Please check also the compatibility between WinZip and 7-Zip for ZIP/ppmd files.

Здравствуйте, Игорь.
В справке написано:

License
7-Zip Copyright (C) 1999-2007 Igor Pavlov.

Год просто не поправлен или это имеет какой-то смысл?

gora2: I'll fix it. Thanks

7-Zip 9.11 beta was released.

Разве версии сейчас не должны нумероватся как то так: 10.03 beta?

There are no big changes. So I still use use 9.** version numbers. So you can consider it as version N 11 from 2009.

Many thanks for an explanation!

Igor, installer support is the same as 9.10b3?

OS: Vista x64, CPU AMD AM2 K9 X2 4600+ @ 2,8 GHz, 4x2GB DDR2-RAM
CPU utilization was only 50%

7-Zip  9.07 beta  Copyright (C) 1999-2009 Igor Pavlov  2009-08-29
Scanning

Creating archive a.7z

Compressing  patch-2.6.33

Everything is Ok
Timer 9.01 : Igor Pavlov : Public domain : 2009-05-31

Kernel Time  =     0.109 =    1%
User Time    =     8.093 =   98%
Process Time =     8.203 =   99%
Global Time  =     8.253 =  100%

7-Zip  9.07 beta  Copyright (C) 1999-2009 Igor Pavlov  2009-08-29

Processing archive: a.7z

Testing     patch-2.6.33

Everything is Ok

Size:       57354952
Compressed: 9563363
Timer 9.01 : Igor Pavlov : Public domain : 2009-05-31

Kernel Time  =     0.031 =    0%
User Time    =     8.890 =   99%
Process Time =     8.921 =  100%
Global Time  =     8.919 =  100%

7-Zip  9.11 beta  Copyright (C) 1999-2010 Igor Pavlov  2010-03-15
Scanning

Creating archive b.7z

Compressing  patch-2.6.33

Everything is Ok
Timer 9.01 : Igor Pavlov : Public domain : 2009-05-31

Kernel Time  =     0.062 =    0%
User Time    =     7.875 =   98%
Process Time =     7.937 =   99%
Global Time  =     7.970 =  100%

7-Zip  9.11 beta  Copyright (C) 1999-2010 Igor Pavlov  2010-03-15

Processing archive: b.7z

Testing     patch-2.6.33

Everything is Ok

Size:       57354952
Compressed: 9563363
Timer 9.01 : Igor Pavlov : Public domain : 2009-05-31

Kernel Time  =     0.015 =    0%
User Time    =     8.609 =   99%
Process Time =     8.625 =  100%
Global Time  =     8.618 =  100%

I have been using the stable version.  Is there a reason this is still beta?  Should I be concerned about loading and using the beta?

Thanks, Ian

glebe: Yes, as I rememeber,

hitcher2: can you check 32-bit versions also?
Probably the difference for 32-bit versions is larger, since I use new compiler (MSVC 2008 instead of VC 6) for 32-bit PPMd code now.

sure. cmdline was as suggested from you:
"timer 7z a a.7z -m0=ppmd bigfile >> a.txt
timer 7z t a.7z >> a.txt"

7-Zip 9.10 beta  Copyright (C) 1999-2009 Igor Pavlov  2009-12-22
Scanning

Creating archive g.7z

Compressing  patch-2.6.33

Everything is Ok
Timer 9.01 : Igor Pavlov : Public domain : 2009-05-31

Kernel Time  =     0.062 =    0%
User Time    =     8.593 =   98%
Process Time =     8.656 =   99%
Global Time  =     8.706 =  100%

7-Zip 9.10 beta  Copyright (C) 1999-2009 Igor Pavlov  2009-12-22

Processing archive: g.7z

Testing     patch-2.6.33

Everything is Ok

Size:       57354952
Compressed: 9563363
Timer 9.01 : Igor Pavlov : Public domain : 2009-05-31

Kernel Time  =     0.046 =    0%
User Time    =     9.468 =   99%
Process Time =     9.515 =   99%
Global Time  =     9.524 =  100%

7-Zip 9.11 beta  Copyright (C) 1999-2010 Igor Pavlov  2010-03-15
Scanning

Creating archive h.7z

Compressing  patch-2.6.33

Everything is Ok
Timer 9.01 : Igor Pavlov : Public domain : 2009-05-31

Kernel Time  =     0.093 =    1%
User Time    =     8.140 =   98%
Process Time =     8.234 =   99%
Global Time  =     8.299 =  100%

7-Zip 9.11 beta  Copyright (C) 1999-2010 Igor Pavlov  2010-03-15

Processing archive: h.7z

Testing     patch-2.6.33

Everything is Ok

Size:       57354952
Compressed: 9563363
Timer 9.01 : Igor Pavlov : Public domain : 2009-05-31

Kernel Time  =     0.000 =    0%
User Time    =     8.765 =   99%
Process Time =     8.765 =   99%
Global Time  =     8.780 =  100%

Igor,

Is 9.11 really a beta, since the folder on the download page does not indicate this.

If 9.11 is stable, then there is something wrong with the announcement.

--
Stefan

Yes, it's beta.

I've removed "beta" word from folder name in SG, since SF uses than string in links for download, but I don't like spaces in links.

this new version seems to be great : very very fast and very good compression

my first test:

db.dmp = 648.331.264 Bytes

"7za a archiv.zip -mm=ppmd -mx1 db.dmp"

-mx1 has the same result as -mx2 -archive.zip = 41.797.473 Bytes
-mx3 has the same result as -mx4 -archive.zip = 33.952.967 Bytes
-mx5 has the same result as -mx6 -archive.zip = 32.469.627 Bytes
-mx7 has the same result as -mx8 -archive.zip = 31.607.901 Bytes
-mx9                                                      -archive.zip = 32.759.816 Bytes

best result for this test with -mx7

with one word: awesome

@ipavlov - thank you very much

do plan a non beta version in the near future ?

There was some minor bug in my RAR / PPMD code. To fix it I had to look deep in PPMD code. So I decided to rewrite PPMD code (including C++ -> C porting). That new code was not checked enough. So I plan to keep beta status some time (maybe 3-4 weeks).

-mx7: -mmem=64m -mo=10
-mx9: -mmem=128m -mo=16

-mo=10 is enough for most cases. That is why -mx7 can be better than -mx9.
But probably there are cases (files) with long matching strings, when -mo=16 can be better.

PPMD var.I supports additional mode (CUT-OFF) that can be slightly better in compression ratio for big files, but original PPMD code and WinZip contain bug in that code, so I have disabled that mode now to keep compatibility with WinZip decoder. If Dmitry Shkarin (PPMD author) fixes it and WinZip updates that code, maybe I'll enable CUT-OFF mode. Does somebody need that CUT-OFF model mode in zip/ppmd?

it still has the same old issue .. failed CRC on spanned archives

Простите, что не по английский, но у меня с ним проблемы.
При попытке распаковать многотомный ARJ архив (в частности КЛАДР ГНИВЦ) не все файлы из архива видятся и распаковываються, причём эта история длиться уже довольно давно, я заметил её ещё в версии 4.45
Посмотрите пожалуйста. Может сможете поправить?

ruzbel:
1) Install 7-Zip 9.11
2) Select all ARJ volumes and press "Extract" button.

@ipavlov

thank you very much for your quick answer
and i want to congratulate you to the very successfull rewrite of the ppmd -code !!

2 asks:

"original Zip file format limited
the number of member files in a Zip file to 65,535,
and the maximum size of both
the Zip file itself and any member file to 4 gigabytes"

Are this limits too within the zip-files with are created with 7z or are there other limits ?
Is it possible to store filenames with Unicode-Characters (or UTF-8-Characters) within a zip-file ?

best regards

--
PPMD var.I supports additional mode (CUT-OFF) that can be slightly better in compression ratio for big files, but original PPMD code and WinZip contain bug in that code, so I have disabled that mode now to keep compatibility with WinZip decoder. If Dmitry Shkarin (PPMD author) fixes it and WinZip updates that code, maybe I'll enable CUT-OFF mode. Does somebody need that CUT-OFF model mode in zip/ppmd?
--
it would be interesting to test this CUT-OFF mode to see how many bytes we can save
- maybe a extra switch like -mm=ppmdCUT for testing ?

best regards

Igor, it is incredible to be able to take FAR Manager with a single damn plugin with me everywhere and be able to unpack dozens of archive/installer formats right away. :-) Thank you very much and keep up the good work!

Please add split size 4G(fat32)
and compress each file in seperate archive button
thx AndiB