A JsonView extending ExtbaseJsonView to circumvent some of the performance problems

JsonView.php

<?php

declare(strict_types=1);

namespace MyVendor\MyExtension\View;

use TYPO3\CMS\Extbase\Mvc\View\JsonView as ExtbaseJsonView;
use TYPO3\CMS\Extbase\Persistence\ObjectStorage;
use TYPO3\CMS\Extbase\Reflection\ObjectAccess;

class JsonView extends ExtbaseJsonView {

	/**
	 * Always transform ObjectStorage to Array
	 *
	 * @param mixed $value
	 * @param array $configuration
	 * @return array
	 * @see https://usetypo3.com/json-view.html
	 */
	protected function transformValue($value, array $configuration) {
		if ($value instanceof ObjectStorage) {
			$value = $value->toArray();
		}

		return parent::transformValue($value, $configuration);
	}

	private $propertyNames = [];

	/**
	 * Traverses the given object structure in order to transform it into an
	 * array structure.
	 *
	 * @param object $object Object to traverse
	 * @param array $configuration Configuration for transforming the given object or NULL
	 * @return array Object structure as an array
	 */
	protected function transformObject($object, array $configuration) {

		$class = get_class($object);

		// for objects from MyExtension
		if (strpos($class, 'MyVendor\\MyExtension\\Domain\\Model\\') === 0) {

			// fetch available properties only once per class instead of for each object, as all objects in our extension have the same properties available
			if (!isset($this->propertyNames[$class])) {
				$this->propertyNames[$class] = ObjectAccess::getGettablePropertyNames($object);
			}

			$propertiesToRender = [];
			foreach ($this->propertyNames[$class] as $propertyName) {
				if (isset($configuration['_only']) && is_array($configuration['_only']) && !in_array($propertyName, $configuration['_only'])) {
					continue;
				}
				if (isset($configuration['_exclude']) && is_array($configuration['_exclude']) && in_array($propertyName, $configuration['_exclude'])) {
					continue;
				}

				// do not fetch getters by reflection for each object, but call them directly, as all are available as 'get' . ucfirst($propertyName)
				$propertyValue = $object->{'get' . ucfirst($propertyName)}();

				if (!is_array($propertyValue) && !is_object($propertyValue)) {
					$propertiesToRender[$propertyName] = $propertyValue;
				} elseif (!isset($configuration['_descend']) || !array_key_exists($propertyName, $configuration['_descend'])) {
					throw new \Exception('The following property was fetched but not used at all! ' . $class . '->get' . ucfirst($propertyName));
				} elseif (isset($configuration['_descend']) && array_key_exists($propertyName, $configuration['_descend'])) {
					$propertiesToRender[$propertyName] = $this->transformValue($propertyValue, $configuration['_descend'][$propertyName]);
				}
			}
		} else {
			$propertiesToRender = parent::transformObject($object, $configuration);
		}

		return $propertiesToRender;
	}

}