Contributes to https://gitlab.com/gitlab-org/gitlab/-/issues/325744

.rubocop_manual_todo.yml

@@ -2834,7 +2834,6 @@ Performance/OpenStruct:
     - 'Guardfile'
     - 'app/finders/snippets_finder.rb'
     - 'app/helpers/application_settings_helper.rb'
-    - 'app/models/cycle_analytics/project_level_stage_adapter.rb'
     - 'ee/lib/gitlab/graphql/aggregations/epics/epic_node.rb'
     - 'ee/lib/gitlab/graphql/aggregations/epics/epic_node.rb'
     - 'lib/api/wikis.rb'

app/models/cycle_analytics/project_level_stage_adapter.rb

@@ -4,6 +4,8 @@
 # compatible with the old value stream controller actions.
 module CycleAnalytics
   class ProjectLevelStageAdapter
+    ProjectLevelStage = Struct.new(:title, :description, :legend, :name, :project_median, keyword_init: true )
+
     def initialize(stage, options)
       @stage = stage
       @options = options
@@ -13,7 +15,7 @@ module CycleAnalytics
     def as_json(serializer: AnalyticsStageSerializer)
       presenter = Analytics::CycleAnalytics::StagePresenter.new(stage)
 
-      serializer.new.represent(OpenStruct.new(
+      serializer.new.represent(ProjectLevelStage.new(
                                  title: presenter.title,
                                  description: presenter.description,
                                  legend: presenter.legend,

changelogs/unreleased/rubocop-performance-openstruct-project-level-stage-adapter.yml

+---
+title: Replace OpenStruct with Struct in project_level_stage_adapter.rb
+merge_request: 59956
+author: Amit Patel @amit.savani
+type: performance