[Twig] Cache template class resolution

Author: smnandre

src/TwigComponent/src/ComponentRenderer.php

@@ -24,6 +24,8 @@
  */
 final class ComponentRenderer implements ComponentRendererInterface
 {
+    private array $templateClasses = [];
+    
     public function __construct(
         private Environment $twig,
         private EventDispatcherInterface $dispatcher,
@@ -62,15 +64,15 @@ public function render(MountedComponent $mounted): string
         $variables = $event->getVariables();
         // see ComponentNode. When rendering an individual embedded component,
         // *not* through its parent, we need to set the parent template.
-        if ($event->getTemplateIndex()) {
+        if ($templateIndex = $event->getTemplateIndex()) {
             $variables['__parent__'] = $event->getParentTemplateForEmbedded();
         }
-
+        
         try {
             return $this->twig->loadTemplate(
-                $this->twig->getTemplateClass($event->getTemplate()),
-                $event->getTemplate(),
-                $event->getTemplateIndex(),
+                $this->templateClasses[$template = $event->getTemplate()] ??= $this->twig->getTemplateClass($template),
+                $template,
+                $templateIndex,
             )->render($variables);
         } finally {
             $mounted = $this->componentStack->pop();