Turn on performance based cops

Use attr_reader/attr_writer instead of methods

method is 12% slower

Use flat_map over map.flatten(1)

flatten is 66% slower

Use hash[]= instead of hash.merge! with single arguments

merge! is 166% slower

See https://github.com/rails/rails/pull/32337 for more conversation

1 files changed, 1 insertions, 15 deletions

diff --git a/activemodel/test/cases/dirty_test.rb b/activemodel/test/cases/dirty_test.rb
index b120e68027..b38d84fff2 100644
--- a/activemodel/test/cases/dirty_test.rb
+++ b/activemodel/test/cases/dirty_test.rb
@@ -14,37 +14,23 @@ class DirtyTest < ActiveModel::TestCase
       @status = "initialized"
     end
 
-    def name
-      @name
-    end
+    attr_reader :name, :color, :size, :status
 
     def name=(val)
       name_will_change!
       @name = val
     end
 
-    def color
-      @color
-    end
-
     def color=(val)
       color_will_change! unless val == @color
       @color = val
     end
 
-    def size
-      @size
-    end
-
     def size=(val)
       attribute_will_change!(:size) unless val == @size
       @size = val
     end
 
-    def status
-      @status
-    end
-
     def status=(val)
       status_will_change! unless val == @status
       @status = val