As far as I understand it, the number of visble entities (models, sprites and maps) are in the clip_near and clip_far range and the direction of the camera.
If I am wrong, please tell me.

Now I try to reduce the number of entities in my level, I have a count of 250 ergo a verry low fps.
I have changed 54 models into 1: same visible entities count, no change at all.
I made part of my level as a map: same visible entities count. Is a map counted as 1 or more?

Now I am getting confused why this count is not getting less.
Can anyone explain this to me?

using maps will not reduce your entities/anything. There simply additional files in a group that you can apply actions/materials/etc to...

Thanks, but I know what you can do with a map.
The questions are:
1. is a map counted as 1 entity in visible entities?
2. if I change 54 models into 1 model, why is the visible entities count not reduced with 53?
3. is my first statement in my first post correct?

Is there really no one that can answer my questions?