perf(issues): Fix N+1 queries in starred views endpoint

src/sentry/api/serializers/models/groupsearchview.py

@@ -1,6 +1,8 @@
 from collections.abc import MutableMapping
 from typing import Any, TypedDict
 
+from django.db.models import prefetch_related_objects
+
 from sentry.api.serializers import Serializer, register
 from sentry.models.groupsearchview import GroupSearchView
 from sentry.models.groupsearchviewlastvisited import GroupSearchViewLastVisited
@@ -33,6 +35,7 @@ def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
 
     def get_attrs(self, item_list, user, **kwargs) -> MutableMapping[Any, Any]:
+        prefetch_related_objects(item_list, "projects")
         attrs: MutableMapping[Any, Any] = {}
 
         last_visited_views = GroupSearchViewLastVisited.objects.filter(
@@ -68,7 +71,7 @@ def get_attrs(self, item_list, user, **kwargs) -> MutableMapping[Any, Any]:
         return attrs
 
     def serialize(self, obj, attrs, user, **kwargs) -> GroupSearchViewSerializerResponse:
-        projects = [-1] if obj.is_all_projects else list(obj.projects.values_list("id", flat=True))
+        projects = [-1] if obj.is_all_projects else [p.id for p in obj.projects.all()]
 
         return {
             "id": str(obj.id),

src/sentry/api/serializers/models/groupsearchviewstarred.py

@@ -3,7 +3,6 @@
 from sentry.api.serializers import Serializer, register, serialize
 from sentry.api.serializers.models.groupsearchview import (
     GroupSearchViewSerializer,
-    GroupSearchViewSerializerResponse,
 )
 from sentry.models.groupsearchviewstarred import GroupSearchViewStarred
 from sentry.models.savedsearch import SORT_LITERALS
@@ -28,13 +27,14 @@ def __init__(self, *args, **kwargs):
         self.organization = kwargs.pop("organization", None)
         super().__init__(*args, **kwargs)
 
-    def serialize(self, obj, attrs, user, **kwargs) -> GroupSearchViewStarredSerializerResponse:
-        serialized_view: GroupSearchViewSerializerResponse = serialize(
-            obj.group_search_view,
+    def get_attrs(self, item_list, user, **kwargs):
+        views = [item.group_search_view for item in item_list]
+        serialized_views = serialize(
+            views,
             user,
-            serializer=GroupSearchViewSerializer(
-                organization=self.organization,
-            ),
+            serializer=GroupSearchViewSerializer(organization=self.organization),
         )
+        return dict(zip(item_list, serialized_views))
 
-        return serialized_view
+    def serialize(self, obj, attrs, user, **kwargs) -> GroupSearchViewStarredSerializerResponse:
+        return attrs