Add Bullet gem to detect N+1 queries.

Gemfile

@@ -144,6 +144,7 @@ group :test, :development do
   gem 'spork-rails'
   gem 'pry-nav'
   gem 'byebug', require: ENV['RM_INFO'].nil?
+  gem 'bullet'
 end
 
 group :development do

Gemfile.lock

@@ -62,6 +62,9 @@ GEM
     binding_of_caller (0.7.2)
       debug_inspector (>= 0.0.1)
     builder (3.2.2)
+    bullet (5.0.0)
+      activesupport (>= 3.0.0)
+      uniform_notifier (~> 1.9.0)
     byebug (8.2.1)
     certified (1.0.0)
     coderay (1.1.0)
@@ -395,6 +398,7 @@ GEM
     unicorn (5.1.0)
       kgio (~> 2.6)
       raindrops (~> 0.7)
+    uniform_notifier (1.9.0)
 
 PLATFORMS
   ruby
@@ -407,6 +411,7 @@ DEPENDENCIES
   barber
   better_errors
   binding_of_caller
+  bullet
   byebug
   certified
   discourse-qunit-rails

config/environments/development.rb

@@ -52,4 +52,10 @@ Discourse::Application.configure do
     config.developer_emails = emails.split(",").map(&:downcase).map(&:strip)
   end
 
+  config.after_initialize do
+    Bullet.enable = true
+    Bullet.alert = true
+    Bullet.console = true
+    Bullet.rails_logger = true
+  end
 end