Added & use Gitlab::Routing for URL helpersrouting

Rails' "url_helpers" method creates an anonymous Module (which a bunch
of methods) on every call. By caching the output of this method in a
dedicated method we can shave off about 10 seconds of loading time for
an issue with around 200 comments.

1 files changed, 13 insertions, 0 deletions

diff --git a/lib/gitlab/routing.rb b/lib/gitlab/routing.rb
new file mode 100644
index 00000000000..5132177de51
--- /dev/null
+++ b/lib/gitlab/routing.rb
@@ -0,0 +1,13 @@
+module Gitlab
+  module Routing
+    # Returns the URL helpers Module.
+    #
+    # This method caches the output as Rails' "url_helpers" method creates an
+    # anonymous module every time it's called.
+    #
+    # Returns a Module.
+    def self.url_helpers
+      @url_helpers ||= Gitlab::Application.routes.url_helpers
+    end
+  end
+end