This idea of **asynchronous** code described above is also sometimes called **"concurrency"**. It is different from **"parallelism"**.

**Concurrency** and **parallelism** both relate to "different things happening more or less at the same time".

But the details between *concurrency* and *parallelism* are quite different.

To see the difference, imagine the following story about burgers:

### Parallele Hamburger { #parallel-burgers }

Stellen wir uns jetzt vor, dass es sich hierbei nicht um „nebenläufige Hamburger“, sondern um „parallele Hamburger“ handelt.

Sie gehen los mit Ihrem Schwarm, um paralleles Fast Food zu bekommen.

* l’en-tête transféré

* le système d’injection de dépendances
* la dépendance
* l’élément dépendable
* le dépendant

* lié aux E/S
* lié au processeur
* concurrence
* parallélisme
* multi-traitement

* la variable d’env
* la variable d’environnement
* le `PATH`
* la variable `PATH`

* l’authentification
* le fournisseur d’authentification
* l’autorisation

### Eşzamanlılık ve Burgerler { #concurrency-and-burgers }

Yukarıda anlatılan **asenkron** kod fikrine bazen **"eşzamanlılık"** (concurrency) da denir. **"Paralellik"**ten (parallelism) farklıdır.

**Eşzamanlılık** ve **paralellik**, "aynı anda az çok birden fazla şeyin olması" ile ilgilidir.

Ama *eşzamanlılık* ve *paralellik* arasındaki ayrıntılar oldukça farklıdır.

### Конкурентность лучше параллелизма? { #is-concurrency-better-than-parallelism }

Нет! Мораль истории не в этом.

    /**
     * ProjectBuilder parallelism.
     *
     * @since 4.0.0
     */
    @Config(type = "java.lang.Integer", defaultValue = "cores/2 + 1")
    public static final String MAVEN_MODEL_BUILDER_PARALLELISM = "maven.modelBuilder.parallelism";

    /**
     * User property for enabling/disabling the consumer POM feature.
     *

### Чи краща рівночасність за паралелізм? { #is-concurrency-better-than-parallelism }

Ні! Це не мораль історії.

### Concorrência é melhor que paralelismo? { #is-concurrency-better-than-parallelism }

Não! Essa não é a moral da história.

* the `Authorization` header
* the forwarded header

* the dependency injection system
* the dependency
* the dependable
* the dependant

* I/O bound
* CPU bound
* concurrency
* parallelism
* multiprocessing

* the env var
* the environment variable
* the `PATH`
* the `PATH` variable

* the authentication
* the authentication provider
* the authorization

   *
   * <p>To avoid having this type, we could use {@code FlatMapSpliterator} directly. The main
   * advantages to having the type are the ability to use its constructor reference below and the
   * parallelism with the primitive version. In short, it makes its caller ({@code flatMap})
   * simpler.
   *
   * @param <InElementT> the element type of the input spliterator