From dde91e9bf5ab246f0f684b40288b272f4ba9a699 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Fri, 8 Aug 2014 11:41:54 -0700
Subject: save a hash allocation per request.

---
 railties/lib/rails/engine.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'railties/lib/rails')

diff --git a/railties/lib/rails/engine.rb b/railties/lib/rails/engine.rb
index aa4f94ef1b..dc3da1eb41 100644
--- a/railties/lib/rails/engine.rb
+++ b/railties/lib/rails/engine.rb
@@ -509,7 +509,7 @@ module Rails
     def call(env)
       env.merge!(env_config)
       if env['SCRIPT_NAME']
-        env.merge! "ROUTES_#{routes.object_id}_SCRIPT_NAME" => env['SCRIPT_NAME'].dup
+        env["ROUTES_#{routes.object_id}_SCRIPT_NAME"] = env['SCRIPT_NAME'].dup
       end
       app.call(env)
     end
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