Merge branch 'sh-cache-pipeline-find-commits' into 'master'

Cache FindCommit results in pipelines view

See merge request gitlab-org/gitlab-ce!26776

app/controllers/projects/pipelines_controller.rb

@@ -31,10 +31,7 @@ class Projects::PipelinesController < Projects::ApplicationController
         Gitlab::PollingInterval.set_header(response, interval: POLLING_INTERVAL)
 
         render json: {
-          pipelines: PipelineSerializer
-            .new(project: @project, current_user: @current_user)
-            .with_pagination(request, response)
-            .represent(@pipelines, disable_coverage: true, preload: true),
+          pipelines: serialize_pipelines,
           count: {
             all: @pipelines_count,
             running: @running_count,
@@ -150,6 +147,15 @@ class Projects::PipelinesController < Projects::ApplicationController
 
   private
 
+  def serialize_pipelines
+    ::Gitlab::GitalyClient.allow_ref_name_caching do
+      PipelineSerializer
+        .new(project: @project, current_user: @current_user)
+        .with_pagination(request, response)
+        .represent(@pipelines, disable_coverage: true, preload: true)
+    end
+  end
+
   def render_show
     respond_to do |format|
       format.html do

changelogs/unreleased/sh-cache-pipeline-find-commits.yml

@@ -0,0 +1,5 @@
+---
+title: Cache FindCommit results in pipelines view
+merge_request: 26776
+author:
+type: performance

spec/controllers/projects/pipelines_controller_spec.rb

@@ -28,6 +28,8 @@ describe Projects::PipelinesController do
       end
 
       it 'returns serialized pipelines', :request_store do
+        expect(::Gitlab::GitalyClient).to receive(:allow_ref_name_caching).and_call_original
+
         queries = ActiveRecord::QueryRecorder.new do
           get_pipelines_index_json
         end