DOS ain't dead - C vs. ASM (size vs speed)

C vs. ASM (size vs speed) (Developers)

posted by Rugxulo , Usono, 07.04.2009, 13:35
(edited by Rugxulo on 07.04.2009, 13:46)

> > (And to dispel another myth: if GCC is always better than assembly
> > optimization, then why is GCC compiled by itself so slow??)
>
> http://compilers.iecc.com/comparch/article/03-11-086

I really hope that the GCC devs still test on stuff older than a Core 2. (Sometimes I regret that developers have such fast machines because I think it makes them lazy ... or blind perhaps.)

EDIT: Headers vs. units still doesn't explain why successive GCCs keep getting slower, even with -O0. It shouldn't have to do that much more these days than it did ten years ago (for C89, at least), right?

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Complete thread:

GNU Emacs for DJGPP (22.3 or 23.0.92) - Rugxulo, 01.04.2009, 20:46 (Developers)
- GNU Emacs for DJGPP (22.3 or 23.0.92) - marcov, 01.04.2009, 23:28
  - GNU Emacs for DJGPP (22.3 or 23.0.92) - Rugxulo, 02.04.2009, 00:20
    - GNU Emacs for DJGPP (22.3 or 23.0.92) - Dennis, 04.04.2009, 18:38
      - GNU Emacs for DJGPP (22.3 or 23.0.92) - Rugxulo, 04.04.2009, 20:10
        GNU Emacs for DJGPP (22.3 or 23.0.92) - Dennis, 04.04.2009, 22:23
        GNU Emacs for DJGPP (22.3 or 23.0.92) - Rugxulo, 05.04.2009, 23:47
        GNU Emacs for DJGPP (22.3 or 23.0.92) - Dennis, 06.04.2009, 01:25
        65536 byte text files - ecm, 06.04.2009, 19:23
        65536 byte text files - Rugxulo, 07.04.2009, 00:01
        65536 byte text files - ecm, 07.04.2009, 00:14
        C vs. ASM (size vs speed) - Rugxulo, 07.04.2009, 00:27
        C vs. ASM (size vs speed) - marcov, 07.04.2009, 13:20
        C vs. ASM (size vs speed) - Rugxulo, 07.04.2009, 13:35
        C vs. ASM (size vs speed) - marcov, 08.04.2009, 10:33
        C vs. ASM (size vs speed) - Rugxulo, 08.04.2009, 19:24
        C vs. ASM (size vs speed) - RayeR, 08.04.2009, 21:09
        C vs. ASM (size vs speed) - rr, 08.04.2009, 21:16
        C vs. ASM (size vs speed) - EZGCC for v2 - Rugxulo, 09.04.2009, 01:11
        C vs. ASM (size vs speed) - EZGCC for v2 - RayeR, 09.04.2009, 23:15
        C vs. ASM (size vs speed) - EZGCC for v2 - Rugxulo, 10.04.2009, 05:02
        C vs. ASM (size vs speed) - EZGCC for v2 - RayeR, 10.04.2009, 14:05
        C vs. ASM (size vs speed) - marcov, 08.04.2009, 21:44
        C vs. ASM (size vs speed) - Rugxulo, 09.04.2009, 00:55
        C vs. ASM (size vs speed) - marcov, 09.04.2009, 09:09
        C vs. ASM (size vs speed) - Rugxulo, 09.04.2009, 14:14
        C vs. ASM (size vs speed) - marcov, 09.04.2009, 21:17
        C vs. ASM (size vs speed) - Rugxulo, 09.04.2009, 21:38
        C vs. ASM (size vs speed) - marcov, 10.04.2009, 10:16
        EZ-GCC v2 for 386 (1.2 MB 5.25" FD) - Rugxulo, 16.04.2009, 18:38
        EZ-GCC v2 for 386, GNU Emacs 23.0.95 pretest - Rugxulo, 05.07.2009, 21:22
        GNU Emacs 23.0.96 pretest (last one!) - Rugxulo, 16.07.2009, 06:07
        GNU Emacs 23.1 - Rugxulo, 11.09.2009, 06:54
        GNU Emacs for DJGPP (22.3 or 23.0.92) - Rugxulo, 07.04.2009, 00:00
- GNU Emacs 23.0.92 pretest (DJGPP) - Rugxulo, 04.04.2009, 20:38
- GNU Emacs for DJGPP (23.0.92 "pretest") - Rugxulo, 09.04.2009, 21:40