DOS ain't dead - p7zip 9.20.1b "testing"

p7zip 9.20.1b "testing" (Users)

posted by Rugxulo , Usono, 25.08.2012, 00:04

Hi,

> Tested 9.20, and it works just fine for me in all modes, and LZMA -mx8 and
> -mx9 work very well! However, your compile of 9.20 is 5-10% slower in
> deflate -mx9 than the old 9.13 compile posted here over a year ago...

What cpu are you on? I only did "-O2 -mtune=i686". Perhaps other settings would be better for you? ("-O3? -fomit-frame-pointer -mtune=??") This "old" G++ 3.4.6 compiler probably isn't as good as newer ones. I haven't tried building "natively" (under DOSEMU) with latest DJGPP's 4.7.1 yet. (That would be preferred by me but is always more difficult.)

> Also, your 9.20 is ~200k more bloated than that old 9.13,

Probably a libc issue, who knows. I could rebuild entirely with "-Os", but it wouldn't be faster, probably slower.

> which I still use,
> and which was also compiled with [FSU] pthreads. There seems no speed advantage
> at all to 9.13 vs 9.20, are there any hidden advantages?

Honestly, I don't know, perhaps bugfixes. I didn't check the changelog, just assumed it was better! :-)

http://www.7-zip.org/history.txt

> EDITED to ask if it's possible to get a compile of 7zip .ZIP deflate modes
> ONLY, without any other compression modules?

No, not really, not that I know of. You can try AdvanceComp's ADVZIP.EXE ("-z4") to repack .ZIPs in place. It may? also allow creating archives from scratch, but I don't know if that's .7z only or what (can't remember).

http://advancemame.sourceforge.net/comp-readme.html

http://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/util/file/7zip/advancecomp/

N.B. Those binaries of his are several years old, so if you want fresher (probably more bloated but faster), I can oblige. Just please mention compiler settings preferrred. ;-)

> Anyway, thanks for making 9.20 available for us to test.

I assume this means you used the second one ('\' fixes, aka "9.20.1b-testing")?

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Complete thread:

p7zip 9.20.1 - Rugxulo, 20.08.2012, 22:46 (Users)
- p7zip 9.20.1 - mvojvodic, 21.08.2012, 22:43
  - p7zip 9.20.1b "testing" - Rugxulo, 23.08.2012, 00:16
    - p7zip 9.20.1b "testing" - Zyzzle, 24.08.2012, 22:02
      - p7zip 9.20.1b "testing" - Rugxulo, 25.08.2012, 00:04
        p7zip 9.20.1b "testing" - Zyzzle, 25.08.2012, 00:59
        p7zip 9.20.1b "testing" - Rugxulo, 25.08.2012, 01:58
        p7zip 9.20.1b "testing" - Zyzzle, 26.08.2012, 04:09
        p7zip 9.20.1b "testing" - Rugxulo, 26.08.2012, 04:59
        p7zip 9.20.1b "testing" - Rugxulo, 31.08.2012, 23:05
        p7zip 9.20.1b "testing" - Rugxulo, 02.09.2012, 22:27
        p7zip 9.20.1b "testing" - Zyzzle, 04.09.2012, 23:59
        p7zip 9.20.1b "testing" - Rugxulo, 05.09.2012, 02:12
        p7zip 9.20.1b "testing" - Khusraw, 05.09.2012, 10:30
        p7zip 9.20.1b "testing" - Rugxulo, 06.09.2012, 23:21
        p7zip 9.20.1b "testing" - favero, 21.09.2012, 20:04
        p7zip 9.20.1b "testing" - Rugxulo, 22.09.2012, 06:16
        p7zip 9.20.1b "testing" - Khusraw, 23.09.2012, 19:44
        7ZA 9.20 rebuilt by Khusraw - Rugxulo, 11.10.2012, 21:56
        7ZA 9.20 rebuilt by Khusraw - Khusraw, 12.10.2012, 16:30
        7ZA 9.20 rebuilt by Khusraw - Rugxulo, 13.10.2012, 05:35
        7ZA 9.20 rebuilt by Khusraw - Khusraw, 13.10.2012, 09:06
        AdvanceComp 1.15 -- rebuilt with newer compiler - Rugxulo, 25.08.2012, 02:33
        AdvanceComp 1.15 -- rebuilt with newer compiler - roytam, 20.03.2013, 07:58
        AdvanceComp 1.15 -- rebuilt with newer compiler - Rugxulo, 21.03.2013, 18:03
        AdvanceComp 1.15 -- rebuilt with newer compiler - roytam, 22.03.2013, 01:03
        GCC 4.8.0 (DJGPP 2.04 only) - Rugxulo, 28.03.2013, 00:24