refactor: lowercase event name calling twice

Author: ddevsr

system/Events/Events.php

@@ -149,16 +149,19 @@ public static function trigger($eventName, ...$arguments): bool
 
         $listeners = static::listeners($eventName);
 
+        // Lower case when CI_DEBUG is enabled
+        $lowerEventName = CI_DEBUG ? strtolower($eventName) : false;
+
         foreach ($listeners as $listener) {
             $start = microtime(true);
 
             $result = static::$simulate === false ? $listener(...$arguments) : true;
 
-            if (CI_DEBUG) {
+            if ($lowerEventName !== false) {
                 static::$performanceLog[] = [
                     'start' => $start,
                     'end'   => microtime(true),
-                    'event' => strtolower($eventName),
+                    'event' => $lowerEventName,
                 ];
             }