Resolve Performance/Sum rubocop offenses

Changelog: other
EE: true

.rubocop_todo.yml

@@ -311,23 +311,6 @@ Performance/StringInclude:
     - 'spec/spec_helper.rb'
     - 'spec/support_specs/helpers/active_record/query_recorder_spec.rb'
 
-# Offense count: 18
-# Cop supports --auto-correct.
-Performance/Sum:
-  Exclude:
-    - 'app/controllers/projects/pipelines/tests_controller.rb'
-    - 'app/models/application_setting_implementation.rb'
-    - 'app/models/ci/pipeline.rb'
-    - 'app/services/issues/export_csv_service.rb'
-    - 'ee/spec/lib/gitlab/elastic/bulk_indexer_spec.rb'
-    - 'lib/api/entities/issuable_time_stats.rb'
-    - 'lib/container_registry/tag.rb'
-    - 'lib/gitlab/ci/reports/test_suite_comparer.rb'
-    - 'lib/gitlab/diff/file.rb'
-    - 'lib/gitlab/usage_data.rb'
-    - 'lib/peek/views/detailed_view.rb'
-    - 'spec/models/namespace/root_storage_statistics_spec.rb'
-
 # Offense count: 15209
 # Configuration parameters: Prefixes.
 # Prefixes: when, with, without

app/controllers/projects/pipelines/tests_controller.rb

@@ -42,9 +42,9 @@ module Projects
       end
 
       def test_suite
-        suite = builds.map do |build|
+        suite = builds.sum do |build|
           build.collect_test_reports!(Gitlab::Ci::Reports::TestReports.new)
-        end.sum
+        end
 
         Gitlab::Ci::Reports::TestFailureHistory.new(suite.failed.values, project).load!
 

app/models/application_setting_implementation.rb

@@ -403,7 +403,7 @@ module ApplicationSettingImplementation
   def normalized_repository_storage_weights
     strong_memoize(:normalized_repository_storage_weights) do
       repository_storages_weights = repository_storages_weighted.slice(*Gitlab.config.repositories.storages.keys)
-      weights_total = repository_storages_weights.values.reduce(:+)
+      weights_total = repository_storages_weights.values.sum
 
       repository_storages_weights.transform_values do |w|
         next w if weights_total == 0

app/models/ci/pipeline.rb

@@ -653,7 +653,7 @@ module Ci
     def coverage
       coverage_array = latest_statuses.map(&:coverage).compact
       if coverage_array.size >= 1
-        coverage_array.reduce(:+) / coverage_array.size
+        coverage_array.sum / coverage_array.size
       end
     end
 

app/services/issues/export_csv_service.rb

@@ -52,7 +52,7 @@ module Issues
 
     # rubocop: disable CodeReuse/ActiveRecord
     def issue_time_spent(issue)
-      issue.timelogs.map(&:time_spent).sum
+      issue.timelogs.sum(&:time_spent)
     end
     # rubocop: enable CodeReuse/ActiveRecord
   end

ee/spec/lib/gitlab/elastic/bulk_indexer_spec.rb

@@ -53,7 +53,7 @@ RSpec.describe Gitlab::Elastic::BulkIndexer, :elastic, :clean_gitlab_redis_share
       indexer.process(issue_as_ref)
 
       expect(es_client).to have_received(:bulk) do |args|
-        body_bytesize = args[:body].map(&:bytesize).reduce(:+)
+        body_bytesize = args[:body].sum(&:bytesize)
         expect(body_bytesize).to be <= bulk_limit_bytes
       end
 
@@ -109,7 +109,7 @@ RSpec.describe Gitlab::Elastic::BulkIndexer, :elastic, :clean_gitlab_redis_share
       indexer.process(issue_as_ref)
 
       expect(es_client).to have_received(:bulk) do |args|
-        body_bytesize = args[:body].map(&:bytesize).reduce(:+)
+        body_bytesize = args[:body].sum(&:bytesize)
         expect(body_bytesize).to be <= bulk_limit_bytes
       end
 

lib/api/entities/issuable_time_stats.rb

@@ -18,7 +18,7 @@ module API
       # rubocop: disable CodeReuse/ActiveRecord
       def total_time_spent
         # Avoids an N+1 query since timelogs are preloaded
-        object.timelogs.map(&:time_spent).sum
+        object.timelogs.sum(&:time_spent)
       end
       # rubocop: enable CodeReuse/ActiveRecord
     end

lib/container_registry/tag.rb

@@ -104,7 +104,7 @@ module ContainerRegistry
     def total_size
       return unless layers
 
-      layers.map(&:size).sum if v2?
+      layers.sum(&:size) if v2?
     end
     # rubocop: enable CodeReuse/ActiveRecord
 

lib/gitlab/ci/reports/test_suite_comparer.rb

@@ -106,7 +106,7 @@ module Gitlab
         private
 
         def max_tests(*used)
-          [DEFAULT_MAX_TESTS - used.map(&:count).sum, DEFAULT_MIN_TESTS].max
+          [DEFAULT_MAX_TESTS - used.sum(&:count), DEFAULT_MIN_TESTS].max
         end
       end
     end

lib/gitlab/diff/file.rb

@@ -296,13 +296,13 @@ module Gitlab
 
       # rubocop: disable CodeReuse/ActiveRecord
       def size
-        valid_blobs.map(&:size).sum
+        valid_blobs.sum(&:size)
       end
       # rubocop: enable CodeReuse/ActiveRecord
 
       # rubocop: disable CodeReuse/ActiveRecord
       def raw_size
-        valid_blobs.map(&:raw_size).sum
+        valid_blobs.sum(&:raw_size)
       end
       # rubocop: enable CodeReuse/ActiveRecord
 

lib/peek/views/detailed_view.rb

@@ -23,7 +23,7 @@ module Peek
       private
 
       def duration
-        detail_store.map { |entry| entry[:duration] }.sum * 1000
+        detail_store.sum { |entry| entry[:duration] } * 1000
       end
 
       def calls

spec/models/namespace/root_storage_statistics_spec.rb

@@ -178,7 +178,7 @@ RSpec.describe Namespace::RootStorageStatistics, type: :model do
           snippets = create_list(:personal_snippet, 3, :repository, author: user)
           snippets.each { |s| s.statistics.refresh! }
 
-          total_personal_snippets_size = snippets.map { |s| s.statistics.repository_size }.sum
+          total_personal_snippets_size = snippets.sum { |s| s.statistics.repository_size }
 
           root_storage_statistics.recalculate!