* Perform attribute interpolation as part of dicing. * Remove temporary subd uv and face index attributes. On a MacBook M3 with 12 P-cores and 4 E-cores, these changes overall give a 10x-14x speedup on various scenes. Note that splitting is still single threaded and can be expensive, and UV subdivision can be optimized more. Pull Request: https://projects.blender.org/blender/blender/pulls/136411