diff --git a/activesupport/lib/active_support/core_ext/date_and_time/compatibility.rb b/activesupport/lib/active_support/core_ext/date_and_time/compatibility.rb
index 3f4e236ab726c1a812c32a59c30fa16dcf1e64e0..db95ae0db5ebb45b0257f210a1200ed881df4951 100644
--- a/activesupport/lib/active_support/core_ext/date_and_time/compatibility.rb
+++ b/activesupport/lib/active_support/core_ext/date_and_time/compatibility.rb
@@ -12,7 +12,11 @@ module Compatibility
     mattr_accessor(:preserve_timezone, instance_writer: false) { false }
 
     def to_time
-      preserve_timezone ? getlocal(utc_offset) : getlocal
+      if preserve_timezone
+        @_to_time_with_instance_offset ||= getlocal(utc_offset)
+      else
+        @_to_time_with_system_offset ||= getlocal
+      end
     end
   end
 end