[vtk-developers] GL_COMPILE versus GL_COMPILE_AND_EXECUTE

[Ken Martin]

One thing to be aware of in these timing tests. Most OpenGL drivers default
to not doing a swapbuffer until the vertical retrace of the monitor. This
limits your rendering rate to your refresh rate. On small models with fast
cards this is a problem. Usually you can adjust this on the advanced page of
the properties for the display. Frequently there is an OpenGL options page.

Ken


----- Original Message -----
From: <anast.jm at pg.com>
To: <vtk-developers at public.kitware.com>
Sent: Thursday, November 01, 2001 12:06 PM
Subject: [vtk-developers] GL_COMPILE versus GL_COMPILE_AND_EXECUTE


>
> FYI,
>
> now that my build is working again I tried sphere-bench2.4 before and
after
> Ken's changes to the opengl rendering. For my WildcatII 5110 card, I see
no
> speed ups at all, even going back to a June build. I was really hoping to
see
> double performance (-:
>
> Best results, summary :
>   - intel running Windows NT 4.0
>   - VTK 4.0.0 (rev: 1.990, 2001/09/18 08:09:49) Release build
>   - Win32OpenGL
>   - Visual is 1600x1024, truecolor/truecolor/32
>   - Tcl/Tk 8.2.3
>   - window was 400 x 400
>    1) 256x256 : 4995.4 kpolys/s : []
>    2) 256x256 : 4995.4 kpolys/s : [transparency]
>    3) 256x256 : 4989.0 kpolys/s : [stripper]
>    4) 256x256 : 4895.2 kpolys/s : [small_sphere]
>    5) 256x256 : 4895.2 kpolys/s : [texture]
>    6) 256x256 : 4895.2 kpolys/s : [texture, transparency]
>    7) 256x256 : 3284.0 kpolys/s : [wireframe]
>
> ------- DONE (in 11 sec.) -------
>
> Best results, summary :
>   - intel running Windows NT 4.0
>   - VTK 4.0.0 (rev: 1.1041, 2001/11/01 09:14:57) Release build
>   - Win32OpenGL
>   - Visual is 1600x1024, truecolor/truecolor/32
>   - Tcl/Tk 8.2.3
>   - window was 400 x 400
>    1) 256x256 : 4995.4 kpolys/s : [stripper]
>    2) 256x256 : 4995.4 kpolys/s : []
>    3) 256x256 : 4995.4 kpolys/s : [transparency]
>    4) 256x256 : 4995.4 kpolys/s : [texture, transparency]
>    5) 256x256 : 4989.0 kpolys/s : [small_sphere]
>    6) 256x256 : 4895.2 kpolys/s : [texture]
>    7) 256x256 : 3284.0 kpolys/s : [wireframe]
>
> ------- DONE (in 11 sec.) -------
>
> ...john
>
> _______________________________________________
> vtk-developers mailing list
> vtk-developers at public.kitware.com
> http://public.kitware.com/mailman/listinfo/vtk-developers