fix performance regression for Site save, use bulk_update for cached fields

netbox/dcim/signals.py

@@ -211,12 +211,16 @@ def sync_cached_scope_fields(instance, created, **kwargs):
     for model in (Prefix, Cluster, WirelessLAN):
         qs = model.objects.filter(**filters)
 
+        # Bulk update cached fields to avoid O(N) performance issues with large datasets.
+        # This does not trigger post_save signals, avoiding spurious change log entries.
+        objects_to_update = []
         for obj in qs:
             # Recompute cache using the same logic as save()
             obj.cache_related_objects()
-            obj.save(update_fields=[
-                '_location',
-                '_site',
-                '_site_group',
-                '_region',
-            ])
+            objects_to_update.append(obj)
+
+        if objects_to_update:
+            model.objects.bulk_update(
+                objects_to_update,
+                ['_location', '_site', '_site_group', '_region']
+            )

netbox/translations/en/LC_MESSAGES/django.po

@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2026-01-15 05:05+0000\n"
+"POT-Creation-Date: 2026-01-13 05:05+0000\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -12489,8 +12489,8 @@ msgstr ""
 msgid "Delete Selected"
 msgstr ""
 
-#: netbox/netbox/plugins/navigation.py:53
-#: netbox/netbox/plugins/navigation.py:89
+#: netbox/netbox/plugins/navigation.py:55
+#: netbox/netbox/plugins/navigation.py:88
 msgid "Permissions must be passed as a tuple or list."
 msgstr ""
 
@@ -12498,7 +12498,7 @@ msgstr ""
 msgid "Buttons must be passed as a tuple or list."
 msgstr ""
 
-#: netbox/netbox/plugins/navigation.py:95
+#: netbox/netbox/plugins/navigation.py:92
 msgid "Button color must be a choice within ButtonColorChoices."
 msgstr ""