From 1f75319a9af595d5de3dca55e26547c7f1b166fa Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Mon, 1 Jul 2013 18:06:25 -0700
Subject: avoid intermediate zipped array

---
 activerecord/lib/active_record/relation/calculations.rb | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

(limited to 'activerecord')

diff --git a/activerecord/lib/active_record/relation/calculations.rb b/activerecord/lib/active_record/relation/calculations.rb
index fe1480d8c2..477da618df 100644
--- a/activerecord/lib/active_record/relation/calculations.rb
+++ b/activerecord/lib/active_record/relation/calculations.rb
@@ -161,9 +161,8 @@ module ActiveRecord
         result = result.map do |attributes|
           values = klass.initialize_attributes(attributes).values
 
-          columns.zip(values).map do |column, value|
-            column.type_cast(value)
-          end
+          iter = columns.each
+          values.map { |value| iter.next.type_cast value }
         end
         columns.one? ? result.map!(&:first) : result
       end
-- 
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