Revert 'bc5896e'

actionpack/lib/action_view/base.rb

@@ -332,9 +332,6 @@ def pick_template(template_path)
       end
     end
 
-    extend ActiveSupport::Memoizable
-    memoize :pick_template
-
     private
       # Renders the template present at <tt>template_path</tt>. The hash in <tt>local_assigns</tt>
       # is made available as local variables.

actionpack/lib/action_view/partials.rb

@@ -102,8 +102,6 @@ module ActionView
   #
   # As you can see, the <tt>:locals</tt> hash is shared between both the partial and its layout.
   module Partials
-    extend ActiveSupport::Memoizable
-
     private
       def render_partial(partial_path, object_assigns = nil, local_assigns = {}) #:nodoc:
         local_assigns ||= {}
@@ -131,12 +129,14 @@ def render_partial_collection(partial_path, collection, partial_spacer_template
 
         local_assigns = local_assigns ? local_assigns.clone : {}
         spacer = partial_spacer_template ? render(:partial => partial_spacer_template) : ''
+        _paths = {}
+        _templates = {}
 
         index = 0
         collection.map do |object|
           _partial_path ||= partial_path || ActionController::RecordIdentifier.partial_path(object, controller.class.controller_path)
-          path = find_partial_path(_partial_path)
-          template = pick_template(path)
+          path = _paths[_partial_path] ||= find_partial_path(_partial_path)
+          template = _templates[path] ||= pick_template(path)
           local_assigns[template.counter_name] = index
           result = template.render_partial(self, object, local_assigns, as)
           index += 1
@@ -153,6 +153,5 @@ def find_partial_path(partial_path)
           "_#{partial_path}"
         end
       end
-      memoize :find_partial_path
   end
 end