DOS ain't dead

Speed differences - be more specific (Miscellaneous)

posted by Japheth , Germany (South), 07.12.2007, 21:27

> The fact is, file IO is not optimized. Directory searching, fat searching
> and file IO are not using these calls. They are using single sector (or
> potentially cluster) reads/writes.

"single sector" is impossible, but "single cluster" might be. The benchmark program mentioned previously hooks Int 13h and counts the read/writes. For FreeDOS, there were indeed significantly more Int 13h read/writes than for MS-DOS, but IIRC it was about 2000 reads (MS-DOS about 1000) for a 40 MB file on a 32 GB partition.

---
MS-DOS forever!

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