When set to solid-shading, GPU_update_grid_buffers was calling normal_quad_v3 to output into a mapped buffer, but normal_quad_v3 reads as well as writes. This fix actually makes a huge performance difference with my drivers (Gallium/Radeon).
When set to solid-shading, GPU_update_grid_buffers was calling normal_quad_v3 to output into a mapped buffer, but normal_quad_v3 reads as well as writes. This fix actually makes a huge performance difference with my drivers (Gallium/Radeon).