Optimize perf by replacing call_user_func with dynamic vars

Author: ostrolucky

ContainerBuilder.php

@@ -1160,7 +1160,7 @@ private function createService(Definition $definition, array &$inlineServices, $
                 throw new InvalidArgumentException(sprintf('The configure callable for class "%s" is not a callable.', \get_class($service)));
             }
 
-            \call_user_func($callable, $service);
+            $callable($service);
         }
 
         return $service;

LazyProxy/Instantiator/RealServiceInstantiator.php

@@ -28,6 +28,6 @@ class RealServiceInstantiator implements InstantiatorInterface
      */
     public function instantiateProxy(ContainerInterface $container, Definition $definition, $id, $realInstantiator)
     {
-        return \call_user_func($realInstantiator);
+        return $realInstantiator();
     }
 }

Loader/ClosureLoader.php

@@ -35,7 +35,7 @@ public function __construct(ContainerBuilder $container)
      */
     public function load($resource, $type = null)
     {
-        \call_user_func($resource, $this->container);
+        $resource($this->container);
     }
 
     /**