Improve performance of Pipelines API

app/finders/pipelines_finder.rb

@@ -20,6 +20,7 @@ class PipelinesFinder
       end
 
     scoped_pipelines.order(id: :desc)
+      .includes(project: [:namespace])
   end
 
   private

app/models/ci/pipeline.rb

@@ -124,7 +124,7 @@ module Ci
     end
 
     def artifacts
-      builds.latest.with_artifacts_not_expired
+      builds.latest.with_artifacts_not_expired.includes(project: [:namespace])
     end
 
     def project_id
@@ -173,7 +173,11 @@ module Ci
     end
 
     def manual_actions
-      builds.latest.manual_actions
+      builds.latest.manual_actions.includes(project: [:namespace])
+    end
+
+    def stuck?
+      builds.pending.any?(&:stuck?)
     end
 
     def retryable?

app/serializers/pipeline_entity.rb

@@ -33,9 +33,7 @@ class PipelineEntity < Grape::Entity
       pipeline.yaml_errors.present?
     end
 
-    expose :stuck?, as: :stuck do |pipeline|
-      pipeline.builds.any?(&:stuck?)
-    end
+    expose :stuck?, as: :stuck
   end
 
   expose :ref do