Using a time query, I get 8 ms/frame when no tris hit the screen. Maybe your card is just 8x better than mine :> What kind of GPU is that? Mine is a really low end card, radeon HD 5450... Curious to compare GPU benchmark stats from videocardbenchmark.net . . . I get a G3D Mark of 234 . . . So I'm "pretty sure" this is vertex bound. After all, all vertices sent through still need to be processed and transformed through the vertex shader before it can even be determined that they're offscreen to bypass the fragment shader.
Yeah, I'm glad that it *works* - but slightly disappointed it doesn't really come close to good engines' optimizations. Like I've mentioned before as a comparison, the darkplaces quake engine that xonotic runs with this same exact map on my system runs at 200+ FPS. From what I've heard they use a combination of portals, and pre-baked PVS