Supplier<Integer> memoizedSupplier = Suppliers.memoize(countingSupplier);
    checkMemoize(countingSupplier, memoizedSupplier);
  }

  public void testMemoize_redudantly() {
    memoize_redudantlyTest(new CountingSupplier());
    memoize_redudantlyTest(new SerializableCountingSupplier());
  }

  private void memoize_redudantlyTest(CountingSupplier countingSupplier) {

    Supplier<Integer> memoizedSupplier = Suppliers.memoize(countingSupplier);
    checkMemoize(countingSupplier, memoizedSupplier);
  }

  public void testMemoize_redudantly() {
    memoize_redudantlyTest(new CountingSupplier());
    memoize_redudantlyTest(new SerializableCountingSupplier());
  }

  private void memoize_redudantlyTest(CountingSupplier countingSupplier) {

   * delegating calls until it returns valid data.
   *
   * <p>If {@code delegate} is an instance created by an earlier call to {@code memoize}, it is
   * returned directly.
   */
  public static <T extends @Nullable Object> Supplier<T> memoize(Supplier<T> delegate) {
    if (delegate instanceof NonSerializableMemoizingSupplier
        || delegate instanceof MemoizingSupplier) {
      return delegate;
    }

   * delegating calls until it returns valid data.
   *
   * <p>If {@code delegate} is an instance created by an earlier call to {@code memoize}, it is
   * returned directly.
   */
  public static <T extends @Nullable Object> Supplier<T> memoize(Supplier<T> delegate) {
    if (delegate instanceof NonSerializableMemoizingSupplier
        || delegate instanceof MemoizingSupplier) {
      return delegate;
    }

      <w>coroutines</w>
      <w>crossinline</w>
      <w>fqname</w>
      <w>goto</w>
      <w>gradle</w>
      <w>infos</w>
      <w>intrinsics</w>
      <w>kdoc</w>
      <w>lateinit</w>
      <w>memoize</w>
      <w>memoized</w>
      <w>multiline</w>
      <w>navigatable</w>
      <w>preload</w>
      <w>preloader</w>
      <w>preloading</w>
      <w>preprocess</w>
      <w>proximities</w>
      <w>redeclarations</w>

        break;
      case TERMINATED:
      case FAILED:
        throw new AssertionError();
    }
  }

  private void enqueueFailedEvent(final State from, final Throwable cause) {
    // can't memoize this one due to the exception
    listeners.enqueue(
        new ListenerCallQueue.Event<Listener>() {
          @Override
          public void call(Listener listener) {
            listener.failed(from, cause);

Let's see the previous example again:

```Python hl_lines="6"
{!../../../docs_src/response_status_code/tutorial001.py!}
```

`201` is the status code for "Created".

But you don't have to memorize what each of these codes mean.

You can use the convenience variables from `fastapi.status`.

```Python hl_lines="1  6"
{!../../../docs_src/response_status_code/tutorial002.py!}
```

 * memorized and kept as long as supplier instance is kept open.
 * <p>
 * This class is not thread safe and must be used from one thread only, while the constructed {@link RepositorySystem}
 * is thread safe.
 * <p>
 * Important: Given the instance of supplier memorizes the supplier {@link RepositorySystem} instance it supplies,

* la sécurité - HTTPS
* l'exécution au démarrage
* les redémarrages
* la réplication (le nombre de processus en cours d'exécution)
* la mémoire
* les étapes précédant le démarrage

## Avertissement

Si vous avez besoin de réaliser des traitements lourds en tâche d'arrière-plan et que vous n'avez pas besoin que ces traitements aient lieu dans le même process (par exemple, pas besoin de partager la mémoire, les variables, etc.), il peut s'avérer profitable d'utiliser des outils plus importants tels que <a href="https://docs.celeryq.dev" class="external-link" target="_blank">Celery</a>.