From ea1d050266e76d0200f8ff749e537fc66c17ff4f Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Wed, 28 Jul 2010 15:25:24 -0700
Subject: PERF: fewer objects, using attr_reader for faster method lookup

---
 lib/arel/algebra/relations/operations/project.rb | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/lib/arel/algebra/relations/operations/project.rb b/lib/arel/algebra/relations/operations/project.rb
index b78d5d3e97..17431c9a82 100644
--- a/lib/arel/algebra/relations/operations/project.rb
+++ b/lib/arel/algebra/relations/operations/project.rb
@@ -1,15 +1,11 @@
 module Arel
   class Project < Compound
-    attr_reader :projections
+    attr_reader :projections, :attributes
 
     def initialize(relation, *projections)
       super(relation)
       @projections = projections.collect { |p| p.bind(relation) }
-      @attributes = nil
-    end
-
-    def attributes
-      @attributes ||= Header.new(projections).bind(self)
+      @attributes = Header.new(projections.map { |x| x.bind(self) })
     end
 
     def externalizable?
-- 
cgit v1.2.3