From 38251d2e33ccdfeee7ddbeeba5737c2a36911606 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Thu, 6 Aug 2015 15:19:30 -0700
Subject: prevent string allocations

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

(limited to 'actionpack/lib/action_dispatch/http/request.rb')

diff --git a/actionpack/lib/action_dispatch/http/request.rb b/actionpack/lib/action_dispatch/http/request.rb
index d320556b5d..eeded9ffd0 100644
--- a/actionpack/lib/action_dispatch/http/request.rb
+++ b/actionpack/lib/action_dispatch/http/request.rb
@@ -39,7 +39,7 @@ module ActionDispatch
     ENV_METHODS.each do |env|
       class_eval <<-METHOD, __FILE__, __LINE__ + 1
         def #{env.sub(/^HTTP_/n, '').downcase}  # def accept_charset
-          @env["#{env}"]                        #   @env["HTTP_ACCEPT_CHARSET"]
+          @env["#{env}".freeze]                 #   @env["HTTP_ACCEPT_CHARSET"]
         end                                     # end
       METHOD
     end
-- 
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