Merge pull request #4897 from sfadschm/add-filters-timer

[4.2][Debug] Add benchmarking for filters.

system/CodeIgniter.php

@@ -374,7 +374,7 @@ protected function handleRequest(?RouteCollectionInterface $routes, Cache $cache
     {
         $routeFilter = $this->tryToRouteIt($routes);
 
-        // Run "before" filters
+        // Start up the filters
         $filters = Services::filters();
 
         // If any filters were specified within the routes file,
@@ -388,7 +388,10 @@ protected function handleRequest(?RouteCollectionInterface $routes, Cache $cache
 
         // Never run filters when running through Spark cli
         if (! defined('SPARKED')) {
+            // Run "before" filters
+            $this->benchmark->start('before_filters');
             $possibleResponse = $filters->run($uri, 'before');
+            $this->benchmark->stop('before_filters');
 
             // If a ResponseInterface instance is returned then send it back to the client and stop
             if ($possibleResponse instanceof ResponseInterface) {
@@ -427,8 +430,11 @@ protected function handleRequest(?RouteCollectionInterface $routes, Cache $cache
         // Never run filters when running through Spark cli
         if (! defined('SPARKED')) {
             $filters->setResponse($this->response);
+
             // Run "after" filters
+            $this->benchmark->start('after_filters');
             $response = $filters->run($uri, 'after');
+            $this->benchmark->stop('after_filters');
         } else {
             $response = $this->response;