So, here is the situation …
I am looking around in center of a textured cube.
If aY is near of n180 i get ~23 FPS
and if aY is near of n180+90 i get ~93 FPS.
What is causing this?
Other info :
a) Evry side has the same mipmap texture.
b) If i disable texturing i get ~140 FPS at evry aY (and aX) value.
c) I have lighting enabled with one light at eye point