PERF: Only show members count on group page.

app/assets/javascripts/discourse/controllers/group.js.es6

@@ -38,12 +38,9 @@ export default Ember.Controller.extend({
     };
   },
 
-  @observes('counts')
-  countsChanged() {
-    const counts = this.get('counts');
-    this.get('tabs').forEach(tab => {
-      tab.set('count', counts.get(tab.get('name')));
-    });
+  @observes('model.user_count')
+  _setMembersTabCount() {
+    this.get('tabs')[0].set('count', this.get('model.user_count'));
   },
 
   @observes('showing')

app/assets/javascripts/discourse/models/group.js.es6

@@ -166,10 +166,6 @@ Group.reopenClass({
     });
   },
 
-  findGroupCounts(name) {
-    return ajax("/groups/" + name + "/counts.json").then(result => Em.Object.create(result.counts));
-  },
-
   find(name) {
     return ajax("/groups/" + name + ".json").then(result => Group.create(result.basic_group));
   },

app/assets/javascripts/discourse/routes/group.js.es6

@@ -14,12 +14,6 @@ export default Discourse.Route.extend({
     return { name: model.get('name').toLowerCase() };
   },
 
-  afterModel(model) {
-    return Group.findGroupCounts(model.get('name')).then(counts => {
-      this.set('counts', counts);
-    });
-  },
-
   setupController(controller, model) {
     controller.setProperties({ model, counts: this.get('counts') });
   }

app/controllers/groups_controller.rb

@@ -7,23 +7,6 @@ class GroupsController < ApplicationController
     render_serialized(find_group(:id), GroupShowSerializer, root: 'basic_group')
   end
 
-  def counts
-    group = find_group(:group_id)
-
-    counts = {
-      posts: group.posts_for(guardian).count,
-      topics: group.posts_for(guardian).where(post_number: 1).count,
-      mentions: group.mentioned_posts_for(guardian).count,
-      members: group.users.count,
-    }
-
-    if guardian.can_see_group_messages?(group)
-      counts[:messages] = group.messages_for(guardian).where(post_number: 1).count
-    end
-
-    render json: { counts: counts }
-  end
-
   def posts
     group = find_group(:group_id)
     posts = group.posts_for(guardian, params[:before_post_id]).limit(20)

spec/controllers/groups_controller_spec.rb

@@ -25,19 +25,6 @@ describe GroupsController do
     end
   end
 
-  describe "counts" do
-    it "returns counts if it can be seen" do
-      xhr :get, :counts, group_id: group.name
-      expect(response).to be_success
-    end
-
-    it "returns no counts if it can not be seen" do
-      group.update_columns(visible: false)
-      xhr :get, :counts, group_id: group.name
-      expect(response).not_to be_success
-    end
-  end
-
   describe "posts" do
     it "ensures the group can be seen" do
       Guardian.any_instance.expects(:can_see?).with(group).returns(false)