Simplify @responses hash initialization

@responses hash needs to be initialized with mime types that we get from
Collector#collect_mimes_from_class_level. Mime::Type class as key and nil as
value. This need to happen before content negotiation. Before that, it was
looping though mime types and executing mime-type-generated method inside
collector (see
AbstractController::Collector#generate_method_for_mime). That approach resulted
in 2 unnecessary method calls for each mime type
collected by Collector#collect_mimes_from_class_level.

Now hash is initialized in place, without usage of Collector#custom method.

1 files changed, 2 insertions, 1 deletions

diff --git a/actionpack/lib/action_controller/metal/mime_responds.rb b/actionpack/lib/action_controller/metal/mime_responds.rb
index b47abb8b8c..3cb2ebeb94 100644
--- a/actionpack/lib/action_controller/metal/mime_responds.rb
+++ b/actionpack/lib/action_controller/metal/mime_responds.rb
@@ -430,7 +430,8 @@ module ActionController #:nodoc:
 
       def initialize(mimes)
         @responses = {}
-        mimes.each { |mime| send(mime) }
+
+        mimes.each { |mime| @responses["Mime::#{mime.upcase}".constantize] = nil }
       end
 
       def any(*args, &block)