DX8 <> DX8.1 SDK Speed loss

This is a discussion on DX8 <> DX8.1 SDK Speed loss within the Game Programming forums, part of the General Programming Boards category; When I installed the DX8.1 SDK, (i was using the 8.0 sdk before) I lost 150 FPS! Both versions are ...

  1. #1
    Registered User
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    DX8 <> DX8.1 SDK Speed loss

    When I installed the DX8.1 SDK, (i was using the 8.0 sdk before) I lost 150 FPS! Both versions are debug, not retail.

    Any ideas? No code was changed.
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  2. #2
    Guilty Spark 343
    Guest
    Reclaimer,

    In researching the archive, I have found an excerpt from index 341921 that may be of used to you:

    "...imperical testing has shown that DX8.1 is slower than DX8.0, and is considerably slower than DX7.0. This is because of additions necessary to support new, sophisticated drawing modes. Deceleration is further compounded by the inability of the Microsoft programmers to utilize assembly language in the drawing engine...".

    The index becomes vague at this point, referring to scandal and justice department issues of the time.

  3. #3
    Registered User Coder's Avatar
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    Try the retail version. Maybe the debug version of DX8.1 does more debugging work than 8.
    Muhammad Haggag

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