Merge branch '48239-performance-info-ref' into 'master'

Performance tuning on Projects::GitHttpController#info_refs

Closes #48239

See merge request gitlab-org/gitlab-ce!22013

app/models/deploy_token.rb

@@ -4,6 +4,7 @@ class DeployToken < ActiveRecord::Base
   include Expirable
   include TokenAuthenticatable
   include PolicyActor
+  include Gitlab::Utils::StrongMemoize
   add_authentication_token_field :token
 
   AVAILABLE_SCOPES = %i(read_repository read_registry).freeze
@@ -49,8 +50,10 @@ class DeployToken < ActiveRecord::Base
   # to a single project, later we're going to extend
   # that to be for multiple projects and namespaces.
   def project
+    strong_memoize(:project) do
       projects.first
     end
+  end
 
   def expires_at
     expires_at = read_attribute(:expires_at)

app/models/project.rb

@@ -95,8 +95,7 @@ class Project < ActiveRecord::Base
     unless: :ci_cd_settings,
     if: proc { ProjectCiCdSetting.available? }
 
-  after_create :set_last_activity_at
-  after_create :set_last_repository_updated_at
+  after_create :set_timestamps_for_create
   after_update :update_forks_visibility_level
 
   before_destroy :remove_private_deploy_keys
@@ -2103,13 +2102,8 @@ class Project < ActiveRecord::Base
     gitlab_shell.exists?(repository_storage, "#{disk_path}.git")
   end
 
-  # set last_activity_at to the same as created_at
-  def set_last_activity_at
-    update_column(:last_activity_at, self.created_at)
-  end
-
-  def set_last_repository_updated_at
-    update_column(:last_repository_updated_at, self.created_at)
+  def set_timestamps_for_create
+    update_columns(last_activity_at: self.created_at, last_repository_updated_at: self.created_at)
   end
 
   def cross_namespace_reference?(from)

db/migrate/20180927073410_add_index_to_project_deploy_tokens_deploy_token_id.rb

+# frozen_string_literal: true
+
+class AddIndexToProjectDeployTokensDeployTokenId < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    # MySQL already has index inserted
+    add_concurrent_index :project_deploy_tokens, :deploy_token_id if Gitlab::Database.postgresql?
+  end
+
+  def down
+    remove_concurrent_index(:project_deploy_tokens, :deploy_token_id) if Gitlab::Database.postgresql?
+  end
+end

db/schema.rb

@@ -1589,6 +1589,7 @@ ActiveRecord::Schema.define(version: 20181101144347) do
     t.datetime_with_timezone "created_at", null: false
   end
 
+  add_index "project_deploy_tokens", ["deploy_token_id"], name: "index_project_deploy_tokens_on_deploy_token_id", using: :btree
   add_index "project_deploy_tokens", ["project_id", "deploy_token_id"], name: "index_project_deploy_tokens_on_project_id_and_deploy_token_id", unique: true, using: :btree
 
   create_table "project_features", force: :cascade do |t|