m := NewDRWMutex(ds, "")
	var acc0, acc1 uint64
	b.SetParallelism(4)
	b.RunParallel(func(pb *testing.PB) {
		c := make(chan bool)
		var data [4 << 10]uint64
		for i := 0; pb.Next(); i++ {
			if i%4 == 0 {
				m.Lock(id, source)
				acc0 -= 100
				acc1 += 100
				m.Unlock(context.Background())
			} else {
				for i := 0; i < len(data); i += 4 {

                </mxCell>
                <mxCell id="4" value="" style="rounded=0;whiteSpace=wrap;html=1;fontStyle=1;strokeWidth=4;" parent="1" vertex="1">
                    <mxGeometry x="540" y="430" width="440" height="410" as="geometry"/>
                </mxCell>

Por exemplo, no modelo `Image` nós temos um campo `url`, nós podemos declara-lo como um `HttpUrl` do Pydantic invés de como uma `str`:

```Python hl_lines="4  10"
{!../../docs_src/body_nested_models/tutorial005.py!}
```

A string será verificada para se tornar uma URL válida e documentada no esquema JSON/1OpenAPI como tal.

## Atributos como listas de submodelos

	n := 1000
	if testing.Short() {
		n = 5
	}
	HammerRWMutex(1, 1, n)
	HammerRWMutex(1, 3, n)
	HammerRWMutex(1, 10, n)
	HammerRWMutex(4, 1, n)
	HammerRWMutex(4, 3, n)
	HammerRWMutex(4, 10, n)
	HammerRWMutex(10, 1, n)
	HammerRWMutex(10, 3, n)
	HammerRWMutex(10, 10, n)
	HammerRWMutex(10, 5, n)
}

// Borrowed from rwmutex_test.go
func TestDRLocker(t *testing.T) {
	wl := NewLRWMutex()

	github.com/nsqio/go-nsq v1.1.0
	github.com/philhofer/fwd v1.1.3-0.20240916144458-20a13a1f6b7c
	github.com/pierrec/lz4/v4 v4.1.21
	github.com/pkg/errors v0.9.1
	github.com/pkg/sftp v1.13.6
	github.com/pkg/xattr v0.4.10
	github.com/prometheus/client_golang v1.20.2
	github.com/prometheus/client_model v0.6.1
	github.com/prometheus/common v0.59.1
	github.com/prometheus/procfs v0.15.1
	github.com/puzpuzpuz/xsync/v3 v3.4.0

                    <mxGeometry x="550.9" y="410" width="228.21" height="40" as="geometry"/>
                </mxCell>

                    <mxGeometry x="550.9" y="410" width="228.21" height="40" as="geometry"/>
                </mxCell>

예를 들어 `Image` 모델 안에 `url` 필드를 `str` 대신 Pydantic의 `HttpUrl`로 선언할 수 있습니다:

```Python hl_lines="4  10"
{!../../docs_src/body_nested_models/tutorial005.py!}
```

이 문자열이 유효한 URL인지 검사하고 JSON 스키마/OpenAPI로 문서화 됩니다.

## 서브모델 리스트를 갖는 어트리뷰트

`list`, `set` 등의 서브타입으로 Pydantic 모델을 사용할 수도 있습니다:

                    <mxGeometry relative="1" as="geometry">
                        <mxPoint x="410" y="400" as="targetPoint"/>
                        <mxPoint x="585" y="1050" as="sourcePoint"/>
                        <Array as="points"/>
                    </mxGeometry>
                </mxCell>

	}
}

func BenchmarkWriteByte(b *testing.B) {
	const n = 4 << 10
	b.SetBytes(n)
	buf := NewBuffer(make([]byte, n))
	for i := 0; i < b.N; i++ {
		buf.Reset()
		for i := 0; i < n; i++ {
			buf.WriteByte('x')
		}
	}
}

func BenchmarkWriteRune(b *testing.B) {
	const n = 4 << 10
	const r = '☺'
	b.SetBytes(int64(n * utf8.RuneLen(r)))