DOS ain't dead

Compilation speed with GCC (Developers)

posted by Rugxulo , Usono, 20.06.2008, 21:23

> > > 23). avoid (slow!) virtual memory (CWSDPMI) by freeing up RAM
> >
> > using HDPMI32
>
> Is there some speed comparison of CWSDPMI vs HDPMI? I think he was talking
> about using virtual memory (swapping) which AFAIK HDPMI doesn't support at
> all. So if we compare speed when not paging?

I haven't tested speeds, so I can't say for sure. But even if it ran faster on a 586, it might not run faster on newer cpus (e.g. AMD64 or Core 2). It's very complicated to optimize for several (micro?-)architectures.

Swapping to HD is very slow, obviously moreso than using actual RAM. This is why RAM disks are a good idea (RAM speed > HD speed). And you can disable CWSDPMI swapping by using "lh cwsdpmi -p -s-" (or permanently via CWSPARAM or whatever).

Complete thread:

• Compilation speed with GCC - Rugxulo, 20.06.2008, 00:17 (Developers)
  • Compilation speed with GCC - DOS386, 20.06.2008, 09:38
    • Compilation speed with GCC - RayeR, 20.06.2008, 12:34
      • Compilation speed with GCC - Rugxulo, 20.06.2008, 21:23
        • Compilation speed with GCC - Rugxulo, 21.06.2008, 01:04
          • Compilation speed with GCC - Japheth, 21.06.2008, 09:06
  • Compilation speed with GCC - sol, 20.06.2008, 17:36
    • Compilation speed with GCC - Rugxulo, 20.06.2008, 21:28
  • Compilation speed with GCC - Rugxulo, 21.06.2008, 01:09
    • Compilation speed with GCC - sol, 21.06.2008, 01:22
      • Compilation speed with GCC - Rugxulo, 21.06.2008, 07:44
      • Compilation speed with GCC - marcov, 21.06.2008, 14:07
  • Compilation speed with GCC - marcov, 21.06.2008, 14:03
  • Compilation speed with GCC - marcov, 21.06.2008, 14:10
    • Compilation speed with GCC - Rugxulo, 22.06.2008, 03:16
      • Compilation speed with GCC - marcov, 22.06.2008, 11:39
        • Compilation speed with GCC - Rugxulo, 24.06.2008, 01:29
          • Compilation speed with GCC - sol, 24.06.2008, 01:42
          • Compilation speed with GCC - Rugxulo, 24.06.2008, 03:34
          • Compilation speed with GCC - marcov, 24.06.2008, 09:27
  • Compilation speed with GCC - marcov, 21.06.2008, 14:13
    • Compilation speed with GCC - Rugxulo, 22.06.2008, 03:06
      • Compilation speed with GCC - marcov, 22.06.2008, 11:46
        • Compilation speed with GCC - Rugxulo, 06.07.2008, 17:18
          • Compilation speed with GCC - marcov, 09.07.2008, 18:11
  • Compilation speed with GCC - Rugxulo, 09.09.2008, 22:16