From b197a1adc5234bbc72d3b9f198d14caddccc5a03 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mehmet=20Emin=20=C4=B0NA=C3=87?= <mehmetemininac@gmail.com>
Date: Mon, 25 May 2015 20:07:46 +0300
Subject: [PATCH] Use memoization while accessing request headers for
 minimizing memory usage

---
 actionpack/lib/action_dispatch/http/request.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/actionpack/lib/action_dispatch/http/request.rb b/actionpack/lib/action_dispatch/http/request.rb
index a10bc3e419..0f5c5a8eb1 100644
--- a/actionpack/lib/action_dispatch/http/request.rb
+++ b/actionpack/lib/action_dispatch/http/request.rb
@@ -181,7 +181,7 @@ def head?
     #
     #   request.headers["Content-Type"] # => "text/plain"
     def headers
-      Http::Headers.new(@env)
+      @headers ||= Http::Headers.new(@env)
     end
 
     # Returns a +String+ with the last requested path including their params.