Does Glut is too slow to make 3D engine with it?

I would like to know if glut functions are optimised to make 3D engine for games… and if it wouldn’t be better to make my own function?

GLUT is suitable for making small-to-medium sized OpenGL games and demos. It also eases portability by providing a common set of functions for window manipulation and input in both Windows and Unix. However, if you intend to write a large (like Q3 or Unreal) game, or some kind of application that requires speed over portability, you should probably write your own code.

thanks for your help.

[This message has been edited by Bestel (edited 05-29-2001).]