Improve performance of AR object instantiation

We introduced a performance hit by adding an additional iteration
through a model's attributes on creation. We don't actually need the
values from `Result` to be a hash, we can separate the columns and
values and zip them up ourself during the iteration that we have to do.

1 files changed, 1 insertions, 1 deletions

diff --git a/activerecord/lib/active_record/querying.rb b/activerecord/lib/active_record/querying.rb
index e8de4db3a7..9d4df81b07 100644
--- a/activerecord/lib/active_record/querying.rb
+++ b/activerecord/lib/active_record/querying.rb
@@ -47,7 +47,7 @@ module ActiveRecord
       }
 
       message_bus.instrument('instantiation.active_record', payload) do
-        result_set.map { |record| instantiate(record, column_types) }
+        instantiate_result_set(result_set, column_types)
       end
     end