Why does GluLookAt is more slow than his own matrice

OpenGL OpenGL: Advanced Coding
1

Hi, Im french and I don’t speak very well english. I’ll will try to explain you my problem.

I’ve heard that GluLookAt wasn’t very performant. They said that to use it in a 3D game, it is better to make his own matrice projection. is it true and why?

2

If you call gluLookAt() once per frame, the cost of it is ENTIRELY lost in the background noise.

If you call it hundreds of times per frame, you should re-think your rendering strategy.