Reduce loops in head route matching

actionpack/lib/action_dispatch/journey/router.rb

@@ -110,12 +110,11 @@ def find_routes(req)
             r.path.match?(req.path_info)
           }
 
-          routes =
-            if req.head?
-              match_head_routes(routes, req)
-            else
-              match_routes(routes, req)
-            end
+          if req.head?
+            routes = match_head_routes(routes, req)
+          else
+            routes.select! { |r| r.matches?(req) }
+          end
 
           routes.sort_by!(&:precedence)
 
@@ -131,24 +130,17 @@ def find_routes(req)
         end
 
         def match_head_routes(routes, req)
-          verb_specific_routes = routes.select(&:requires_matching_verb?)
-          head_routes = match_routes(verb_specific_routes, req)
-
-          if head_routes.empty?
-            begin
-              req.request_method = "GET"
-              match_routes(routes, req)
-            ensure
-              req.request_method = "HEAD"
-            end
-          else
-            head_routes
+          head_routes = routes.select { |r| r.requires_matching_verb? && r.matches?(req) }
+          return head_routes unless head_routes.empty?
+
+          begin
+            req.request_method = "GET"
+            routes.select! { |r| r.matches?(req) }
+            routes
+          ensure
+            req.request_method = "HEAD"
           end
         end
-
-        def match_routes(routes, req)
-          routes.select { |r| r.matches?(req) }
-        end
     end
   end
 end