You may be in a build with broken BufferStorage, update to the latest builds and it should run a lot better than that.
After the Vertex Streaming HAck was removed, a few builds did not have NVIDIA cards detected properly, which made it so that they used a really slow buffer streaming method was used, and Twilight Princess was by far the worst of all the games affected.
After the Vertex Streaming HAck was removed, a few builds did not have NVIDIA cards detected properly, which made it so that they used a really slow buffer streaming method was used, and Twilight Princess was by far the worst of all the games affected.