Conflicts: activerecord/examples/performance.rb activerecord/lib/active_record/association_preload.rb activerecord/lib/active_record/associations.rb activerecord/lib/active_record/associations/association_proxy.rb activerecord/lib/active_record/autosave_association.rb activerecord/lib/active_record/base.rb activerecord/lib/active_record/nested_attributes.rb activerecord/test/cases/relations_test.rb