pyopengl-devel

[PyOpenGL-Devel] Error checking induce performance problems

[<ir...@gm...>]

Hi:

 

Profiling a pyopengl application I have been developing I obtained this
results:

 

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)

   213189   11.436    0.000   26.370    0.000 globjects.py:27(render)

  2145235    6.653    0.000   12.704    0.000 error.py:162(glCheckError)

  2144179    6.050    0.000    6.050    0.000 win32.py:72(safeGetError)

 

Where render is the function that does the main work of the app. As you can
see, error checking takes almost one half of the real work time. I think it
could be a good idea to be able to disable error checking once you know your
code works ok.

 

After Reading http://pyopengl.sourceforge.net/ctypes/using.html, I tried
this:

 

from OpenGL import error
def foobar(): pass

error.ErrorChecker.registerChecker(foobar)

 

But there is no gain in performance.

 

Regards,

Jorge

[PyOpenGL-Devel] Error checking induce performance problems

[IvO <ivo...@gm...>]

After some code inspection I figured out that using registerChecker is
not enough ... then,

I did:

from OpenGL.error import ErrorChecker
from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *

. . .
...
...


if __name__ == '__main__':
    ErrorChecker._currentChecker=ErrorChecker.nullGetError #
    main()


The performance increase was huge.
Perhaps it's a bug.
Saludos,
IvO