Adding custom tracer to help track filter_unread pagiation

lib/helpers.rb

@@ -142,6 +142,8 @@ helpers do
       comment_threads = context_threads
     end
 
+
+
     if filter_flagged
       self.class.trace_execution_scoped(['Custom/handle_threads_query/find_flagged']) do
         # TODO replace with aggregate query?
@@ -179,6 +181,7 @@ helpers do
       if request_user and filter_unread
         # Filter and paginate based on user read state.  Requires joining a subdocument of the
         # user object with documents in the contents collection, which has to be done in memory.
+        self.class.trace_execution_scoped(['Custom/handle_threads_query/filter_unread']) do
           read_dates = {}
           read_state = request_user.read_states.where(:course_id => course_id).first
           if read_state
@@ -215,6 +218,7 @@ helpers do
           # there definitely are no more pages.  This is really only acceptable for pagers
           # that don't actually reveal the total number of pages to the user onscreen.
           num_pages = has_more ? page + 1 : page
+        end
       else
         # let the installed paginator library handle pagination
         num_pages = [1, (comment_threads.count / per_page.to_f).ceil].max