Fix N+1 for searching notes (comments) scope

app/models/note.rb

@@ -135,6 +135,7 @@ class Note < ApplicationRecord
              project: [:project_members, :namespace, { group: [:group_members] }])
   end
   scope :with_metadata, -> { includes(:system_note_metadata) }
+  scope :with_web_entity_associations, -> { preload(:project, :author, :noteable) }
 
   scope :for_note_or_capitalized_note, ->(text) { where(note: [text, text.capitalize]) }
   scope :like_note_or_capitalized_note, ->(text) { where('(note LIKE ? OR note LIKE ?)', text, text.capitalize) }

app/presenters/search_service_presenter.rb

@@ -9,7 +9,8 @@ class SearchServicePresenter < Gitlab::View::Presenter::Delegated
     projects: :with_web_entity_associations,
     issues: :with_web_entity_associations,
     merge_requests: :with_web_entity_associations,
-    epics: :with_web_entity_associations
+    epics: :with_web_entity_associations,
+    notes: :with_web_entity_associations
   }.freeze
 
   SORT_ENABLED_SCOPES = %w(issues merge_requests).freeze

changelogs/unreleased/325937-fix-notes-n-plus-1.yml

+---
+title: Fix N+1 for searching notes (comments) scope
+merge_request: 57460
+author:
+type: performance

ee/spec/requests/search_controller_spec.rb

@@ -70,6 +70,16 @@ RSpec.describe SearchController, type: :request do
 
         it_behaves_like 'an efficient database result'
       end
+
+      context 'for notes scope' do
+        let(:creation_traits) { [:on_commit] }
+        let(:object) { :note }
+        let(:creation_args) { { project: project } }
+        let(:params) { { search: '*', scope: 'notes' } }
+        let(:threshold) { 0 }
+
+        it_behaves_like 'an efficient database result'
+      end
     end
   end
 end