* Eine beliebige Folge von Argumenten, die der Reihe nach an die Taskfunktion übergeben werden sollen (`email`).
* Alle Schlüsselwort-Argumente, die an die Taskfunktion übergeben werden sollen (`message="some notification"`).

## Dependency Injection

    /**
     * Associates the specified session data with the given key if the key is currently mapped to the given value. This
     * method provides an atomic compare-and-update of some key's value.
     *
     * @param key the key under which to store the session data, must not be {@code null}
     * @param oldValue the expected data currently associated with the key, may be {@code null}

Você pode declarar múltiplos parâmetros de rota e parâmetros de consulta ao mesmo tempo, o **FastAPI** vai saber o quê é o quê.

E você não precisa declarar eles em nenhuma ordem específica.

Eles serão detectados pelo nome:

{* ../../docs_src/query_params/tutorial004_py310.py hl[6,8] *}

## Parâmetros de consulta obrigatórios

        writeLittleEndianInt(baos, 0); // bufferCount = 0
        writeLittleEndianInt(baos, PacConstants.PAC_VERSION); // valid version
        baos.write(new byte[10]); // Some extra data
        byte[] pacData = baos.toByteArray();

        PACDecodingException e = assertThrows(PACDecodingException.class, () -> new Pac(pacData, keys));
        // Should indicate missing required buffers

* Une fonction de tâche à exécuter en arrière-plan (`write_notification`).
* Les arguments positionnels à passer à la fonction de tâche dans l'ordre (`email`).
* Les arguments nommés à passer à la fonction de tâche (`message="some notification"`).

## Injection de dépendances

    }
  }

  private static boolean equal(@Nullable Object a, @Nullable Object b) {
    return a == b || (a != null && a.equals(b));
  }

  // This one-liner saves us from some ugly casts
  protected Entry<K, V> entry(K key, V value) {
    return mapEntry(key, value);
  }

  @Override
  protected void expectContents(Collection<Entry<K, V>> expected) {

    void testWithLargeBuffers() {
        // Test with large byte arrays
        byte[] largeRequestBuffer = new byte[1024];
        byte[] largeResponseBuffer = new byte[2048];

        // Fill with some test data
        for (int i = 0; i < largeRequestBuffer.length; i++) {
            largeRequestBuffer[i] = (byte) (i % 256);
        }
        for (int i = 0; i < largeResponseBuffer.length; i++) {

In some cases, for pure data validation and processing, you can get performance improvements of **20x** or more. This means 2,000% or more. 🤯

When you use **FastAPI**, there's a lot more going on, processing the request and response, handling dependencies, executing **your own code**, and particularly, **waiting for the network**. But you will probably still get some nice performance improvements just from the upgrade.

`User-Agent`, `Host`, `Connection`, and `Content-Type`. It will add an `Accept-Encoding` header for transparent response compression unless the header is already present. If you’ve got cookies, OkHttp will add a `Cookie` header with them.

Some requests will have a cached response. When this cached response isn’t fresh, OkHttp can do a _conditional GET_ to download an updated response if it’s newer than what’s cached. This requires headers like `If-Modified-Since` and `If-None-Match` to be...

   * other {@code ClassValue} entries for the exception type to be tested. This lets us evaluate
   * whether our solution scales to use with multiple exception types and to whether it is affected
   * by other {@code ClassValue} users. Some of the benchmarked implementations don't use one or
   * both of these mechanisms, so they will be unaffected.
   */
  @Param({"0", "1", "12"})
  int otherEntriesInDataStructure;