chore: improve app query performance

- Reduce N+1 queries
- Cache where possible/logical

app/controllers/admin/events_controller.rb

@@ -2,7 +2,7 @@ class Admin::EventsController < Admin::BaseController
   before_action :set_event, only: [:show, :edit, :update, :destroy]
 
   def index
-    @events = Event.with_attachments.by_starts_at.decorate
+    @events = Event.includes(:location, :races, :logo_attachment).by_starts_at.decorate
   end
 
   def show

app/controllers/admin/participants_controller.rb

@@ -2,7 +2,7 @@ class Admin::ParticipantsController < Admin::BaseController
   before_action :set_participant, only: [:edit, :update, :destroy, :show]
 
   def index
-    @q = Participant.includes(:registration, :race).ransack(params[:q])
+    @q = Participant.includes(registration: [:payment, :race, :event]).ransack(params[:q])
     @participants = @q.result.page(params[:page])
 
     respond_to do |format|

app/controllers/admin/races_controller.rb

@@ -2,7 +2,7 @@ class Admin::RacesController < Admin::BaseController
   before_action :set_race, except: [:index, :new, :create]
 
   def index
-    @races = Race.by_starts_at
+    @races = Race.includes(:event, :participants).by_starts_at
   end
 
   def show

app/controllers/application_controller.rb

@@ -23,7 +23,7 @@ def set_time_zone(&block)
   end
 
   def set_menu_items
-    @menu_events = Event.with_attachments.is_active.order(:starts_at)
+    @menu_events = Event.is_active.order(:starts_at)
   end
 
   def set_drift_key

app/controllers/events_controller.rb

@@ -6,9 +6,9 @@ def index
   end
 
   def show
-    if @event.present? && @event.is_active?
+    if @event.is_active?
       @location = @event.location
-      @races = @event.races.active.not_archived.order(starts_at: :asc)
+      @races = @event.races.includes(:course_map_attachment, :elevation_profile_attachment).active.not_archived.order(starts_at: :asc)
     else
       redirect_to(
         root_path,

app/controllers/static_pages_controller.rb

@@ -9,8 +9,8 @@ def danger
   end
 
   def home
-    @events = Event.with_attachments.is_active.by_starts_at.decorate
-    @sponsors = Sponsor.with_attachments.order(:name).decorate
+    @events = Event.includes(:location, :cover_photo_attachment).is_active.by_starts_at.decorate
+    @sponsors = Sponsor.includes(:logo_attachment).order(:name).decorate
     @promo_photos = @events.map { |event| event.promo_photos.first(4) }.flatten!
   end
 

app/models/participant.rb

@@ -32,7 +32,7 @@ class Participant < ApplicationRecord
   scope :with_payment, -> { joins(:payment) }
   scope :created_after, ->(time) { after(time) }
   scope :not_cancelled, -> { joins(:registration).where(registrations: { cancelled_at: nil }) }
-  scope :for_start_list, -> { with_payment.not_cancelled }
+  scope :for_start_list, -> { includes(:event).with_payment.not_cancelled }
 
   def full_name
     "#{first_name} #{last_name}".titleize

app/views/admin/races/_table.html.haml

@@ -9,4 +9,5 @@
         %th{scope: "col"}
     %tbody
       - @races.each do |race|
-        = render "race_row", race: race.decorate
+        - cache race do
+          = render "race_row", race: race.decorate

app/views/shared/sections/_promo_photos_grid.html.haml

@@ -18,6 +18,7 @@
     .row
       .card-columns
         - @promo_photos.each do |promo_photo|
-          .card
-            %a{"data-gallery" => "example-gallery", "data-toggle" => "lightbox", href: url_for(promo_photo)}
-              = image_tag promo_photo, class: "img img-fluid rounded"
+          - cache promo_photo do
+            .card
+              %a{"data-gallery" => "example-gallery", "data-toggle" => "lightbox", href: url_for(promo_photo)}
+                = image_tag promo_photo, class: "img img-fluid rounded"

config/environments/development.rb

@@ -61,4 +61,10 @@
   # Use an evented file watcher to asynchronously detect changes in source code,
   # routes, locales, etc. This feature depends on the listen gem.
   config.file_watcher = ActiveSupport::EventedFileUpdateChecker
+
+  config.after_initialize do
+    Bullet.enable = true
+    Bullet.rails_logger = true
+    Bullet.add_footer = true
+  end
 end