Improve database performance by removing duplicated queries and using eager loading

app/Composers/DashboardComposer.php

@@ -26,6 +26,42 @@
  */
 class DashboardComposer
 {
+    private $componentCount;
+
+    private $incidentCount;
+
+    private $incidentTemplateCount;
+
+    private $scheduleCount;
+
+    private $subscriberCount;
+
+    /**
+     * DashboardComposer constructor.
+     */
+    public function __construct()
+    {
+        if (is_null($this->componentCount)) {
+            $this->componentCount = Component::count();
+        }
+
+        if (is_null($this->incidentCount)) {
+            $this->incidentCount = Incident::count();
+        }
+
+        if (is_null($this->incidentTemplateCount)) {
+            $this->incidentTemplateCount = IncidentTemplate::count();
+        }
+
+        if (is_null($this->scheduleCount)) {
+            $this->scheduleCount = Schedule::count();
+        }
+
+        if (is_null($this->subscriberCount)) {
+            $this->subscriberCount = Subscriber::isVerified()->count();
+        }
+    }
+
     /**
      * Bind data to the view.
      *
@@ -35,11 +71,11 @@ class DashboardComposer
      */
     public function compose(View $view)
     {
-        $view->withComponentCount(Component::count());
-        $view->withIncidentCount(Incident::count());
-        $view->withIncidentTemplateCount(IncidentTemplate::count());
-        $view->withScheduleCount(Schedule::count());
-        $view->withSubscriberCount(Subscriber::isVerified()->count());
+        $view->withComponentCount($this->componentCount);
+        $view->withIncidentCount($this->incidentCount);
+        $view->withIncidentTemplateCount($this->incidentTemplateCount);
+        $view->withScheduleCount($this->scheduleCount);
+        $view->withSubscriberCount($this->subscriberCount);
         $view->withIsWriteable(is_writable(app()->bootstrapPath().'/cachet'));
     }
 }

app/Foundation/Providers/ComposerServiceProvider.php

@@ -57,6 +57,6 @@ public function boot(Factory $factory)
      */
     public function register()
     {
-        //
+        $this->app->singleton(DashboardComposer::class);
     }
 }

app/Http/Controllers/Dashboard/ComponentController.php

@@ -73,7 +73,7 @@ public function __construct()
      */
     public function showComponents()
     {
-        $components = Component::orderBy('order')->orderBy('created_at')->get();
+        $components = Component::with('group')->orderBy('order')->orderBy('created_at')->get();
 
         $this->subMenu['components']['active'] = true;
 

app/Http/Controllers/Dashboard/IncidentController.php

@@ -75,7 +75,7 @@ public function __construct(Guard $auth, System $system)
      */
     public function showIncidents()
     {
-        $incidents = Incident::orderBy('created_at', 'desc')->get();
+        $incidents = Incident::with('user')->orderBy('created_at', 'desc')->get();
 
         return View::make('dashboard.incidents.index')
             ->withPageTitle(trans('dashboard.incidents.incidents').' - '.trans('dashboard.dashboard'))

app/Http/Controllers/StatusPageController.php

@@ -96,7 +96,8 @@ public function showIndex()
             $nextDate = $startDate->copy()->addDays($appIncidentDays)->toDateString();
         }
 
-        $allIncidents = Incident::where('visible', '>=', (int) !Auth::check())->whereBetween('occurred_at', [
+        $allIncidents = Incident::with('component')->with('updates.incident')
+            ->where('visible', '>=', (int) !Auth::check())->whereBetween('occurred_at', [
             $endDate->format('Y-m-d').' 00:00:00',
             $startDate->format('Y-m-d').' 23:59:59',
         ])->orderBy('occurred_at', 'desc')->get()->groupBy(function (Incident $incident) {

app/Presenters/ComponentGroupPresenter.php

@@ -20,14 +20,16 @@ class ComponentGroupPresenter extends BasePresenter implements Arrayable
 {
     use TimestampsTrait;
 
+    protected $enabledComponentsLowest = false;
+
     /**
      * Returns the lowest component status.
      *
      * @return string|null
      */
     public function lowest_status()
     {
-        if ($component = $this->wrappedObject->enabled_components_lowest()->first()) {
+        if ($component = $this->enabled_components_lowest()) {
             return AutoPresenter::decorate($component)->status;
         }
     }
@@ -39,7 +41,7 @@ public function lowest_status()
      */
     public function lowest_human_status()
     {
-        if ($component = $this->wrappedObject->enabled_components_lowest()->first()) {
+        if ($component = $this->enabled_components_lowest()) {
             return AutoPresenter::decorate($component)->human_status;
         }
     }
@@ -51,11 +53,25 @@ public function lowest_human_status()
      */
     public function lowest_status_color()
     {
-        if ($component = $this->wrappedObject->enabled_components_lowest()->first()) {
+        if ($component = $this->enabled_components_lowest()) {
             return AutoPresenter::decorate($component)->status_color;
         }
     }
 
+    /**
+     * Return the enabled components from the wrapped object, and cache it if need be.
+     *
+     * @return bool
+     */
+    public function enabled_components_lowest()
+    {
+        if (is_bool($this->enabledComponentsLowest)) {
+            $this->enabledComponentsLowest = $this->wrappedObject->enabled_components_lowest()->first();
+        }
+
+        return $this->enabledComponentsLowest;
+    }
+
     /**
      * Determine the class for collapsed/uncollapsed groups.
      *

app/Presenters/IncidentPresenter.php

@@ -29,6 +29,8 @@ class IncidentPresenter extends BasePresenter implements Arrayable
      */
     protected $dates;
 
+    protected $latest = false;
+
     /**
      * Incident icon lookup.
      *
@@ -248,9 +250,11 @@ public function latest_icon()
      */
     public function latest()
     {
-        if ($update = $this->wrappedObject->updates()->orderBy('created_at', 'desc')->first()) {
-            return $update;
+        if (is_bool($this->latest)) {
+            $this->latest = $this->wrappedObject->updates()->orderBy('created_at', 'desc')->first();
         }
+
+        return $this->latest;
     }
 
     /**

app/Presenters/UserPresenter.php

@@ -12,6 +12,7 @@
 namespace CachetHQ\Cachet\Presenters;
 
 use Illuminate\Contracts\Support\Arrayable;
+use Illuminate\Support\Facades\Config;
 use Laravolt\Avatar\Facade as Avatar;
 use McCool\LaravelAutoPresenter\BasePresenter;
 
@@ -29,7 +30,7 @@ class UserPresenter extends BasePresenter implements Arrayable
      */
     public function avatar()
     {
-        if (setting('enable_external_dependencies')) {
+        if (Config::get('setting.enable_external_dependencies')) {
             return sprintf('https://www.gravatar.com/avatar/%s?size=%d', md5(strtolower($this->email)), 200);
         }