DOS ain't dead - Speed differences

Speed differences - be more specific (Miscellaneous)

posted by Rugxulo , Usono, 05.12.2007, 22:31

> one year ago we did a "file copy" test with FreeDOS, EDR-DOS and MS-DOS.
>
> I used this
> benchmark with a 40 MB file (the benchmark limits file size to 64
> MB).
>
> MS-DOS usually was the fastest. First EDR-DOS was the slowest DOS, but
> after some adjustments speed was increased and it reached MS-DOS speed.
> FreeDOS is now the slowest.

EDIT: What adjustments? More BUFFERS specified in CONFIG.SYS? Shorter PATH to search? Defragged drive w/ full file reorder? HIMEM only or maybe JEMMEX (w/ VME switched on) on a 586?

> However, a test with a current SATA drive and without any cache program
> loaded shows that the differences in speed are negligible.

I do not doubt FreeDOS is the slowest, but I do doubt that it's in dire need of a speedup. In particular, I personally would like to know a few things about any such tests in the future (just to be more accurate):

* what kernel version (2036? 2037?)
* compiled by what (Turbo C? Turbo C++? OpenWatcom?)
* compiled-for target cpu (8086/FAT16? 386/FAT32?)
* what cpus tested in the benchmark (286? 486? Pentium? P4? AMD64?)

For instance, I've heard that a PentiumPro will run 16-bit code slower than a plain ol' Pentium. And of course, just from experience, I know my 486 Sx/25 is dog slow compared to my P166 (which is quite slow compared to my P4 or AMD64).

So, if someone out there wants to test, be prepared to give detailed information on what you used. :-P

---
Know your limits.h

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Complete thread:

Ultimate DOS kernel file copy speed test - lucho, 30.07.2007, 17:38 (Miscellaneous)
- Ultimate DOS kernel file copy speed test - rr, 31.07.2007, 09:20
  - Ultimate DOS kernel file copy speed test - lucho, 31.07.2007, 17:14
    - Ultimate DOS kernel file copy speed test - rr, 31.07.2007, 17:34
    - Ultimate DOS kernel file copy speed test - sol, 30.11.2007, 17:51
      - Speed differences negligible - Japheth, 03.12.2007, 12:25
        Speed differences - be more specific - Rugxulo, 05.12.2007, 22:31
        Speed differences - be more specific - Japheth, 05.12.2007, 23:02
        Speed differences - be more specific - sol, 05.12.2007, 23:05
        Speed differences - be more specific - tom, 06.12.2007, 13:01
        Speed differences - be more specific - sol, 06.12.2007, 17:50
        Speed differences - be more specific - tom, 06.12.2007, 17:59
        Speed differences - be more specific - sol, 06.12.2007, 18:32
        Speed differences - be more specific - sol, 06.12.2007, 18:35
        Speed differences - be more specific - tom, 06.12.2007, 18:49
        Speed differences - be more specific - sol, 06.12.2007, 18:55
        Speed differences - be more specific - tom, 06.12.2007, 19:08
        Speed differences - be more specific - sol, 06.12.2007, 21:30
        Speed differences - be more specific - rr, 07.12.2007, 09:43
        Speed differences - be more specific - tom, 07.12.2007, 11:11
        Speed differences - be more specific - sol, 07.12.2007, 17:09
        Speed differences - be more specific - tom, 07.12.2007, 20:22
        Speed differences - be more specific - sol, 07.12.2007, 20:51
        Speed differences - be more specific - Japheth, 07.12.2007, 21:27
        Speed differences - be more specific - sol, 07.12.2007, 22:40
        Speed differences - be more specific - Japheth, 07.12.2007, 23:20
        Speed differences - be more specific - sol, 08.12.2007, 01:00
        Speed differences negligible - sol, 06.12.2007, 01:14
- Ultimate DOS kernel file copy speed test - Rugxulo, 31.07.2007, 10:12
  - Who said that DOS was dead? - lucho, 31.07.2007, 19:07
    - Who said that DOS was dead? - Steve, 31.07.2007, 19:50
    - Who said that DOS was dead? - rr, 31.07.2007, 20:17
      - Who said that DOS was dead? - lucho, 01.08.2007, 14:55
    - Who said that DOS was dead? - Rugxulo, 01.08.2007, 04:13
  - Ultimate DOS kernel file copy speed test LINUX LINUX ... ... - DOS386, 02.08.2007, 15:28
    - Ultimate DOS kernel file copy speed test LINUX LINUX ... ... - Rugxulo, 03.08.2007, 05:09
- Ultimate DOS kernel file copy speed test || Slowest FreeDOS - DOS386, 02.08.2007, 15:26