1 files changed, 4 insertions, 1 deletions
diff --git a/activesupport/lib/active_support/time_with_zone.rb b/activesupport/lib/active_support/time_with_zone.rb
index f7586efe6a..889f71c4f3 100644
--- a/activesupport/lib/active_support/time_with_zone.rb
+++ b/activesupport/lib/active_support/time_with_zone.rb
@@ -80,7 +80,7 @@ module ActiveSupport
 
     # Returns a <tt>Time</tt> instance of the simultaneous time in the system timezone.
     def localtime(utc_offset = nil)
-      @localtime ||= utc.getlocal(utc_offset)
+      utc.getlocal(utc_offset)
     end
     alias_method :getlocal, :localtime
 
@@ -279,6 +279,7 @@ module ActiveSupport
       end
     end
     alias_method :since, :+
+    alias_method :in, :+
 
     # Returns a new TimeWithZone object that represents the difference between
     # the current object's time and the +other+ time.
@@ -476,6 +477,8 @@ module ActiveSupport
       end
 
       def transfer_time_values_to_utc_constructor(time)
+        # avoid creating another Time object if possible
+        return time if time.instance_of?(::Time) && time.utc?
         ::Time.utc(time.year, time.month, time.day, time.hour, time.min, time.sec + time.subsec)
       end