required: true
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    id: context
    attributes:
      label: Context (optional)
      description: |
        How has this issue affected you? What are you trying to accomplish?
        Providing context helps us come up with a solution that is most useful in the real world
    validations:
      required: false
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    id: page
    attributes:
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 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *

  - type: checkboxes
    id: checks
    attributes:
      label: Initial Checks
      description: Please confirm and check all the following options.
      options:
        - label: I checked that this language is not already being translated in FastAPI docs.
          required: true
        - label: I searched existing discussions to ensure no one else proposed this language.
          required: true

* `feature`: Features
    * New features, adding support for things that didn't exist before.
* `bug`: Fixes

import com.google.caliper.Benchmark;
import org.jspecify.annotations.NullUnmarked;

/**
 * Simple benchmark: create, start, read. This does not currently report the most useful result
 * because it's ambiguous to what extent the stopwatch benchmark is being affected by GC.
 *
 * @author Kevin Bourrillion
 */
@NullUnmarked
public class StopwatchBenchmark {
  @Benchmark
  long stopwatch(int reps) {
    long total = 0;

 * TLSv1

##### COMPATIBLE_TLS versions

 * TLSv1

---

<a name="tlsv13_only"></a>
#### ¹ TLSv1.3 Only

Cipher suites that are only available with TLSv1.3.

<a name="http2_naughty"></a>
#### ² HTTP/2 Cipher Suite Denylist

This decoupling of parts, and being a "microframework" that could be extended to cover exactly what is needed was a key feature that I wanted to keep.

Given the simplicity of Flask, it seemed like a good match for building APIs. The next thing to find was a "Django REST Framework" for Flask.

/// check | Inspired **FastAPI** to

Here are some additional ideas that might be useful when working with Python types.

## Using `Union` or `Optional` { #using-union-or-optional }

If your code for some reason can't use `|`, for example if it's not in a type annotation but in something like `response_model=`, instead of using the vertical bar (`|`) you can use `Union` from `typing`.

For example, you could declare that something could be a `str` or `None`:

```python

/// note | 技術細節

你也可以使用 `from starlette.staticfiles import StaticFiles`。

**FastAPI** 為了方便開發者，提供與 `starlette.staticfiles` 相同的介面作為 `fastapi.staticfiles`。但它其實是直接來自 Starlette。

///

### 什麼是「掛載」 { #what-is-mounting }

「掛載（mounting）」是指在特定路徑下加入一個完整且「獨立」的應用，之後所有該路徑下的子路徑都由它處理。

這與使用 `APIRouter` 不同，因為被掛載的應用是完全獨立的。主應用的 OpenAPI 與文件不會包含掛載應用的任何內容，等等。

你可以在[進階使用者指南](../advanced/index.md)中閱讀更多相關內容。

## 細節 { #details }

///

## What is "Form Data" { #what-is-form-data }

The way HTML forms (`<form></form>`) sends the data to the server normally uses a "special" encoding for that data, it's different from JSON.

**FastAPI** will make sure to read that data from the right place instead of JSON.

/// note | Technical Details