DOS ain't dead - 7-Zip 4.58 & other updates from Michael Kostylev

7-Zip 4.58 & other updates from Michael Kostylev (Announce)

posted by Rugxulo , Usono, 17.06.2008, 03:15

> Time to benchmark it to see how fast it is! :-D

[ Vista ] - Mon 06/16/2008 >p7zip457 b -md20 7-Zip (A) 4.57 Copyright (c) 1999-2007 Igor Pavlov 2007-12-06 p7zip Version 4.57 (locale=C,Utf16=off,HugeFiles=off,1 CPU) RAM size: 128 MB, # CPU hardware threads: 1 RAM usage: 16 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 18: 1142 98 1018 1018 | 12652 100 1230 1233 19: 1047 100 938 938 | 12812 100 1263 1263 20: 998 101 900 909 | 12775 100 1276 1276 ---------------------------------------------------------------- Avr: 100 952 955 100 1257 1257 Tot: 100 1104 1106

[ Vista ] - Mon 06/16/2008 >p7zip b -md20 7-Zip (A) 4.58 beta Copyright (c) 1999-2008 Igor Pavlov 2008-05-05 p7zip Version 4.58 (locale=C,Utf16=off,HugeFiles=off,1 CPU) RAM size: 128 MB, # CPU hardware threads: 1 RAM usage: 16 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 18: 1185 102 1013 1055 | 13317 100 1135 1135 19: 1175 101 1029 1053 | 13546 100 1166 1169 20: 1098 100 1001 1001 | 13966 100 1218 1221 ---------------------------------------------------------------- Avr: 101 1015 1036 100 1173 1175 Tot: 100 1094 1106

EDIT: Here's what his optimization flags were (apparently):

OPTFLAGS=-O3 -mtune=i586

First of all, "-mtune=pentium" is default anyways (see "gcc -v"). Secondly, most computers these days are 686-ish, so for wide distribution, that may? be preferable (although separate compiles would be ideal). Thirdly, "-fomit-frame-pointer" sometimes helps a noticeable bit. Fourthly, it seems that compiling via "-mtune=i686" is actually a lot faster (in most cases) than i386, i486, i586 (usually slowest), don't ask me why ... GNU bias towards newer chips? Easier to optimize for??

---
Know your limits.h

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Complete thread:

7-Zip 4.58 & other updates from Michael Kostylev - Steve, 16.06.2008, 18:36 (Announce)
- 7-Zip 4.58 & other updates from Michael Kostylev - Rugxulo, 17.06.2008, 03:06
  - 7-Zip 4.58 & other updates from Michael Kostylev - Rugxulo, 17.06.2008, 03:15
  - [BUG] Mik's [p]7zip has a PF - DOS386, 17.06.2008, 08:02
    - [BUG] Mik's [p]7zip has a PF - Steve, 17.06.2008, 15:03
    - [BUG] Mik's [p]7zip has a PF - rr, 17.06.2008, 16:37
      - [BUG] Mik's [p]7zip has a PF - Steve, 17.06.2008, 19:53
    - [BUG] Mik's [p]7zip has a PF - Japheth, 17.06.2008, 20:08
      - [BUG] Mik's [p]7zip has a PF - Rugxulo, 18.06.2008, 00:02
        [BUG] Mik's [p]7zip has a PF - DOS386, 18.06.2008, 12:43
        [BUG] Mik's [p]7zip has a PF - Steve, 18.06.2008, 15:55
        [BUG] Mik's [p]7zip has a PF - Japheth, 18.06.2008, 16:19
        [BUG] Mik's [p]7zip has a PF - Steve, 18.06.2008, 19:46
        [BUG] Mik's [p]7zip has a PF - DOS386, 19.06.2008, 08:45
        [BUG] Mik's [p]7zip has a PF - rr, 19.06.2008, 10:30
        [BUG] Mik's [p]7zip has a PF - DOS386, 20.06.2008, 09:58
        [BUG] Mik's [p]7zip has a PF - rr, 20.06.2008, 11:27
        [BUG] Mik's [p]7zip has a PF - Japheth, 19.06.2008, 09:43
        [BUG] Mik's [p]7zip has a PF - rr, 18.06.2008, 16:08
        [BUG] Mik's [p]7zip has a PF - Japheth, 18.06.2008, 16:22
        [BUG] Mik's [p]7zip has a PF - rr, 18.06.2008, 16:41
        [BUG] Mik's [p]7zip has a PF - Japheth, 18.06.2008, 16:57
        [BUG] Mik's [p]7zip has a PF - rr, 18.06.2008, 17:31
        [BUG] Mik's [p]7zip has a PF - Japheth, 18.06.2008, 19:40
        [BUG] Mik's [p]7zip has a PF - rr, 19.06.2008, 10:23