*
 * <p>In order to allow proper garbage collection of unused locks, the edges of the lock graph are
 * weak references.
 *
 * <p><strong>Performance</strong>
 *
 * <p>The extra bookkeeping done by cycle detecting locks comes at some cost to performance.
 * Benchmarks (as of December 2011) show that:
 *
 * <ul>
 *   <li>for an unnested {@code lock()} and {@code unlock()}, a cycle detecting lock takes 38ns as

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

- A fix must not be a feature, for example.

```
commit faf013ec84051b92ae0f420a658b8d35bb7bb000
Author: Klaus Post <******@****.***>
Date:   Thu Nov 18 12:15:22 2021 -0800

    Improve performance on multiple versions (#13573)
```

- A fix must be a valid fix that was reproduced and seen in a customer environment, for example.

```
commit 886262e58af77ebc7c836ef587c08544e9a0c271

    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;

then apps are responsible for calling `OkHttp.initialize(applicationContext)` in `Application.onCreate`.

OkHttp depends on [Okio][okio] for high-performance I/O and the [Kotlin standard library][kotlin]. Both are small libraries with strong backward-compatibility.

We highly recommend you keep OkHttp up-to-date. As with auto-updating web browsers, staying current

`FastAPI` 🤙 🎧-🎓 `Starlette`. , 🚥 👆 ⏪ 💭 ⚖️ ⚙️ 💃, 🌅 🛠️ 🔜 👷 🎏 🌌.

⏮️ **FastAPI** 👆 🤚 🌐 **💃**'Ⓜ ⚒ (FastAPI 💃 🔛 💊):

* 🤙 🎆 🎭. ⚫️ <a href="https://github.com/encode/starlette#performance" class="external-link" target="_blank">1️⃣ ⏩ 🐍 🛠️ 💪, 🔛 🇷🇪 ⏮️ **✳** &amp; **🚶**</a>.
* ** *️⃣ ** 🐕‍🦺.
* -🛠️ 🖥 📋.
* 🕴 &amp; 🤫 🎉.
* 💯 👩‍💻 🏗 🔛 🇸🇲.
* **⚜**, 🗜, 🎻 📁, 🎏 📨.

But it's possible to customize it, you can set a specific CDN, or serve the files yourself.

## Custom CDN for JavaScript and CSS { #custom-cdn-for-javascript-and-css }

    /**
     * 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.

          // 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.
          thrownAtomicReferenceFieldUpdaterFailure = atomicReferenceFieldUpdaterFailure;
          helper = new SynchronizedHelper();
        }
      }
    } else {
      /*

Para produção você usaria `fastapi run` no lugar. 🚀

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

## `fastapi dev`

Quando você roda `fastapi dev`, isso vai executar em modo de desenvolvimento.