Optimize loading index map #5848

Use dict of face sets so we can get face data in O(1) instead of going through all of O(n).

src/bonsai/bonsai/tool/loader.py

@@ -592,22 +592,23 @@ class Loader(bonsai.core.tool.Loader):
             opacity = opacity if opacity is not None else 1.0
             data_list = [d + (opacity,) for d in data_list]
 
+        faces_tex_coord_data = {}
+        for tex_coord_index, face_remap in zip(texture_map, faces_remap, strict=True):
+            faces_tex_coord_data[frozenset(face_remap)] = (tex_coord_index, face_remap)
+
         # Apply attribute to each face
         for bface in bm.faces:
-            face = [loop.vert.index for loop in bface.loops]
+            face = frozenset(loop.vert.index for loop in bface.loops)
             # Find the corresponding index in data list by matching ifc faceset with blender face.
             data_index = None
-            for tex_coord_index, face_remap in zip(texture_map, faces_remap, strict=True):
-                if not all(i in face_remap for i in face):
-                    continue
+            if tex_coord_data := faces_tex_coord_data.get(face):
+                tex_coord_index, face_remap = tex_coord_data
                 # Subtract 1 as tex_coord_index starts with 1.
                 if map_type == "UV":
                     data_index = [tex_coord_index[face_remap.index(i)] - 1 for i in face]
                 else:
                     data_index = [tex_coord_index - 1 for i in face]
-                break
-
-            if data_index is None:
+            else:
                 # This face may be part of another representation item
                 # Or we couldn't match it due to georeferencing.
                 continue