private final NetworkInterfaceInfo remoteInterface;
    private volatile ChannelState state;
    private final long establishedTime;
    private volatile long lastActivityTime;

    // Performance metrics
    private final AtomicLong bytesSent;
    private final AtomicLong bytesReceived;
    private final AtomicLong requestsSent;
    private final AtomicLong requestsReceived;
    private final AtomicLong errors;

      // getDeclaredField to throw a NoSuchFieldException when the field is definitely there.
      // For these users fallback to a suboptimal implementation, based on synchronized. This will
      // be a definite performance hit to those users.
      thrownReflectionFailure = reflectionFailure;
      helper = new SynchronizedAtomicHelper();
    }
    ATOMIC_HELPER = helper;

Para produção, você usaria `fastapi run`. 🚀

Internamente, o **FastAPI CLI** usa o <a href="https://www.uvicorn.dev" class="external-link" target="_blank">Uvicorn</a>, um servidor ASGI de alta performance e pronto para produção. 😎

## `fastapi dev` { #fastapi-dev }

Executar `fastapi dev` inicia o modo de desenvolvimento.

    private final NetworkInterfaceInfo remoteInterface;
    private volatile ChannelState state;
    private final long establishedTime;
    private volatile long lastActivityTime;
    
    // Performance metrics
    private final AtomicLong bytesSent;
    private final AtomicLong bytesReceived;
    private final AtomicLong requestsSent;
    private final AtomicLong requestsReceived;
    private final AtomicLong errors;

 *
 * When a single logical call requires multiple streams due to redirects or authorization
 * challenges, we prefer to use the same physical connection for all streams in the sequence. There
 * are potential performance and behavior consequences to this preference. To support this feature,
 * this class separates _allocations_ from _streams_. An allocation is created by a call, used for

    /**
     * Counter for generating unique session identifiers.
     */
    protected int count = 1;

    /**
     * Cache for storing crawling configurations to improve performance.
     */
    protected Cache<String, CrawlingConfig> crawlingConfigCache;

    /**
     * Initializes the CrawlingConfigHelper by setting up the crawling configuration cache.

    security provider is installed.
 *  Fix: The previous release introduced a performance regression on Android,
    caused by looking up CA certificates. This is now fixed.


## Version 3.1.0

_2016-02-06_

 *  New: WebSockets now defer some writes. This should improve performance for
    some applications.
 *  New: Override `equals()` and `hashCode()` in our new cookie class. This

For instructions or titles in imperative, keep them in imperative, for example "Edit it" to "Edítalo".

---

For the next terms, use the following translations:

* framework: framework (do not translate to "marco")
* performance: rendimiento
* program (verb): programar
* code (verb): programar
* type hints: anotaciones de tipos
* type annotations: anotaciones de tipos
* autocomplete: autocompletado

So, behind the scenes, it will actually work as if everything was the same single app.

///

/// check

You don't have to worry about performance when including routers.

This will take microseconds and will only happen at startup.

So it won't affect performance. ⚡

///

Existem diversas alternativas, incluindo:

* <a href="https://www.uvicorn.dev/" class="external-link" target="_blank">Uvicorn</a>: um servidor ASGI de alta performance.
* <a href="https://hypercorn.readthedocs.io/" class="external-link" target="_blank">Hypercorn</a>: um servidor ASGI compatível com HTTP/2, Trio e outros recursos.