178086d581
The `ibo.tris` extraction in multithread is currently only done if the mesh has only 1 material. Now we cache a map indicating the index of each polygon after sort and thus allow the extraction of tris with materials in multithreaded. As caching is a heavy operation and was already being performed in multi-thread for triangle offsets, no significant improvements are expected. The benefit will be much greater when we can skip updating the cache while transforming a geometry. **Profiling:** ||master:|PATCH: |---|---|---| |large_mesh_editing_materials:|Average: 13.855380 FPS|Average: 15.525684 FPS ||rdata 9ms iter 36ms (frame 71ms)|rdata 9ms iter 29ms (frame 64ms) |subdiv_mesh_final_only_materials:|Average: 28.113742 FPS|Average: 28.633599 FPS ||rdata 0ms iter 1ms (frame 36ms)|rdata 0ms iter 1ms (frame 35ms) 1.1x overall speedup Differential Revision: https://developer.blender.org/D11445