split nil / Hash cases in url_for

this reduces the number of comparisons and method calls `url_for`
requires.  The nil case no longer calls `symbolize_keys`, we already
know options is nil, so no more ||=, and since it is nil we already know
that options[:host] will be nil too.

1 files changed, 4 insertions, 4 deletions

diff --git a/actionview/lib/action_view/routing_url_for.rb b/actionview/lib/action_view/routing_url_for.rb
index 33be06cbf7..b9e4b590e7 100644
--- a/actionview/lib/action_view/routing_url_for.rb
+++ b/actionview/lib/action_view/routing_url_for.rb
@@ -77,10 +77,10 @@ module ActionView
       case options
       when String
         options
-      when nil, Hash
-        options ||= {}
-        options = { :only_path => options[:host].nil? }.merge!(options.symbolize_keys)
-        super
+      when nil
+        super({:only_path => true})
+      when Hash
+        super({ :only_path => options[:host].nil? }.merge!(options.symbolize_keys))
       when :back
         _back_url
       when Array