Optimise update owner history to speed up complex operations

src/ifcopenshell-python/ifcopenshell/api/owner/settings.py

@@ -1,4 +1,5 @@
 # Note: it is the intent for you to override these with your own functions
+users = {}
 
 
 def get_person(ifc):
@@ -14,3 +15,20 @@ def get_organisation(ifc):
 def get_application(ifc):
     applications = ifc.by_type("IfcApplication") or [None]
     return applications[0]
+
+
+def get_user(ifc):
+    person = get_person(ifc)
+    organisation = get_organisation(ifc)
+    if not person or not organisation:
+        return
+    key = f"{person.id()}-{organisation.id()}"
+    user = users.get(key)
+    if not user:
+        for element in ifc.by_type("IfcPersonAndOrganization"):
+            if element.ThePerson == person and element.TheOrganization == organisation:
+                users[key] = element
+                user = element
+        if not user:
+            return ifc.create_entity("IfcPersonAndOrganization", ThePerson=person, TheOrganization=organisation)
+    return user