bim.select_similar_type optimization

1) avoid selecting elements of the same type multiple times
2) iterate over occurrences of the type rather than visible objects, as it's usually smaller amount of objects

src/blenderbim/blenderbim/bim/module/type/operator.py

@@ -18,6 +18,7 @@
 
 import bpy
 import bmesh
+import ifcopenshell.util.element
 import ifcopenshell.util.schema
 import ifcopenshell.util.type
 import ifcopenshell.api
@@ -171,15 +172,22 @@ class SelectSimilarType(bpy.types.Operator):
     def execute(self, context):
         self.file = IfcStore.get_file()
         objects = bpy.context.selected_objects
+
+        # store relating types to avoid selecting same elements multiple times
+        relating_types = set()
+
         for related_object in objects:
             relating_type = ifcopenshell.util.element.get_type(tool.Ifc.get_entity(related_object))
             if not relating_type:
                 related_object.select_set(False)
                 continue
+            relating_types.add(relating_type)
+
+        for relating_type in relating_types:
             related_objects = ifcopenshell.util.element.get_types(relating_type)
-            for obj in context.visible_objects:
-                element = tool.Ifc.get_entity(obj)
-                if element and element in related_objects:
+            for element in related_objects:
+                obj = tool.Ifc.get_object(element)
+                if obj and obj in context.visible_objects:
                     obj.select_set(True)
         return {"FINISHED"}