DOS ain't dead - 7-Zip 4.58 beta released

Steve

US,
07.05.2008, 11:47

7-Zip 4.58 beta released (Announce)

2008-05-05

- Some speed optimizations.
- 7-Zip now can unpack .lzma archives.
- Unicode (UTF-8) support for filenames in .ZIP archives. Now there are 3 modes:
1) Default mode: 7-Zip uses UTF-8, if the local code page doesn't contain required symbols.
2) -mcu switch: 7-Zip uses UTF-8, if there are non-ASCII symbols.
3) -mcl switch: 7-Zip uses local code page.
- Now it's possible to store file creation time in 7z and ZIP archives (-mtc switch).
- 7-Zip now can unpack multivolume RAR archives created with "old style volume names" scheme and names *.001, *.002, ...
- Now it's possible to use -mSW- and -mSW+ switches instead of -mSW=off and -mSW=on
- Some bugs were fixed.
- New localizations: Punjabi (Indian), Pashto.

Home page:
http://www.7-zip.org/

Downloads:
http://www.7-zip.org/download.html
or
http://sourceforge.net/project/showfiles.php?group_id=14481

Rugxulo

Usono,
08.05.2008, 01:52

@ Steve

7-Zip 4.58 beta released

Post reply

> 2008-05-05
>
> - Some speed optimizations.

It's a lot faster (esp. decompression) than 4.57 in my tests. Definitely worth the upgrade.

[ WinXP ] Wed 05/07/2008>7za457 b 7-Zip (A) 4.57 Copyright (c) 1999-2007 Igor Pavlov 2007-12-06 RAM size: 511 MB, # CPU hardware threads: 1 RAM usage: 419 MB, # Benchmark threads: 1 Dict Compressing | Decompressing Speed Usage R/U Rating | Speed Usage R/U Rating KB/s % MIPS MIPS | KB/s % MIPS MIPS 22: 1048 100 1019 1019 | 9903 100 1020 1020 23: 1012 100 1031 1031 | 9784 100 1021 1021 24: 975 100 1051 1048 | 9622 100 1017 1017 25: 743 81 1045 849 | 7246 77 1012 776 ---------------------------------------------------------------- Avr: 95 1037 987 94 1018 958 Tot: 95 1027 973 [ WinXP ] Wed 05/07/2008>scrndump a.txt ======================================================================= [ WinXP ] Wed 05/07/2008>7za b 7-Zip (A) 4.58 beta Copyright (c) 1999-2008 Igor Pavlov 2008-05-05 RAM size: 511 MB, # CPU hardware threads: 1 RAM usage: 419 MB, # Benchmark threads: 1 Dict Compressing | Decompressing Speed Usage R/U Rating | Speed Usage R/U Rating KB/s % MIPS MIPS | KB/s % MIPS MIPS 22: 1133 100 1102 1102 | 12712 100 1147 1147 23: 1110 100 1135 1131 | 12547 100 1148 1148 24: 1073 100 1153 1153 | 12383 100 1151 1149 25: 1014 100 1158 1157 | 12170 100 1144 1144 ---------------------------------------------------------------- Avr: 100 1137 1136 100 1148 1147 Tot: 100 1142 1141 [ WinXP ] Wed 05/07/2008>scrndump b.txt

Steve

US,
08.05.2008, 02:10

@ Rugxulo

7-Zip 4.58 beta released

Post reply

> > 2008-05-05
> >
> > - Some speed optimizations.
>
> It's a lot faster (esp. decompression) than 4.57 in my tests. Definitely
> worth the upgrade.

I've noticed - didn't test as systematicaly as you did, but was able to notice reduced time in large jobs.

One issue: Larger archives than with 4.57. Tested by now in large and small jobs, on mixed file types. Very small percentage difference, possibly a trade-off for better speed.

DOS386

09.05.2008, 07:44

@ Steve

7-Zip 4.58 beta released

Post reply

> New localizations: Punjabi (Indian), Pashto.

On DOS ? Screenshot please :hungry:

FYI, I did bother to test:

- Still works with HX
- Faster: 1.09x compression, 1.2x decompression
- Better compression (15 ppm ... yeah)

Compared against 4.42.

---
This is a LOGITECH mouse driver, but some software expect here
the following string:*** This is Copyright 1983 Microsoft ***

Steve US, 09.05.2008, 08:04 @ DOS386	7-Zip 4.58 beta released Post reply
	> > New localizations: Punjabi (Indian), Pashto. > > On DOS ? Screenshot please The localizations work in the Win GUI. How to see: Run under Windows. Do you read both Punjabi and Pashto? > FYI, I did bother to test: > > - Still works with HX > - Faster: 1.09x compression, 1.2x decompression > - Better compression (15 ppm ... yeah) > > Compared against 4.42. 4.42? Who cares?

DOS386

09.05.2008, 08:07

@ Steve

7-Zip 4.58 beta released

Post reply

> localizations work in the Win GUI. How to see: Run under Windows.

Useless. :-P

> you read both Punjabi and Pashto?

YES. Not necessarily full understand, though. :-P

> 4.42? Who cares?

Me.

---
This is a LOGITECH mouse driver, but some software expect here
the following string:*** This is Copyright 1983 Microsoft ***

Rugxulo

Usono,
09.05.2008, 15:04

@ DOS386

7-Zip 4.58 beta released

Post reply

> - 7-Zip now can unpack .lzma archives.

This may be because some GNU projects are using it (e.g. GNUzilla) in distribution archives instead of Bzip2 (see here for example).

> > 4.42? Who cares?
>
> Me.

During testing of the 4.58 alphas, it was mainly compared against the more recent / "stable" 4.57, and it still wins. However, this is probably due more to using a more recent MSVC compiler on select modules during compilation (although I'm sure Igor manually tweaked the src a bit himself).

> One issue: Larger archives than with 4.57. Tested by now in large and
> small jobs, on mixed file types. Very small percentage difference,
> possibly a trade-off for better speed.

Some are bigger, and some are smaller. It seems to vary widely. The only quick example I could find of bigger (vs. 4.57) was trying to compress 3 .PDF files (and the difference was only 10 bytes, so no big loss).

Steve

US,
09.05.2008, 16:44

@ Rugxulo

7-Zip 4.58 beta released

Post reply

> > One issue: Larger archives than with 4.57. Tested by now in large and
> > small jobs, on mixed file types. Very small percentage difference,
> > possibly a trade-off for better speed.
>
> Some are bigger, and some are smaller. It seems to vary widely. The only
> quick example I could find of bigger (vs. 4.57) was trying to compress 3
> .PDF files (and the difference was only 10 bytes, so no big loss).

My tests on EXEs, text and ZIPs all produced larger 7z files. But I'll stay with 4.58 anyway - speed and bug fixes are worth a few bytes.

Rugxulo Usono, 10.05.2008, 03:43 @ Steve	7-Zip 4.58 beta released Post reply
	> My tests on EXEs, text and ZIPs all produced larger 7z files. But I'll > stay with 4.58 anyway - speed and bug fixes are worth a few bytes. I think he's storing file creation timestamps now, so that probably bloats up the header a tiny tiny bit. Anyways, it's less than 1% difference, so it's no biggie. You can also use "-m0=ppmd" instead of default LZMA, but that uses lots more memory.