# 基准测试

第三方机构 TechEmpower 的基准测试表明在 Uvicorn 下运行的 **FastAPI** 应用程序是 <a href="https://www.techempower.com/benchmarks/#section=test&runid=7464e520-0dc2-473d-bd34-dbdfd7e85911&hw=ph&test=query&l=zijzen-7" class="external-link" target="_blank">可用的最快的 Python 框架之一</a>，仅次于 Starlette 和 Uvicorn 本身 (由 FastAPI 内部使用）。(*)

但是在查看基准得分和对比时，请注意以下几点。

## 基准测试和速度

当你查看基准测试时，几个不同类型的工具被等效地做比较是很常见的情况。

具体来说，是将 Uvicorn，Starlette 和 FastAPI 一起比较（在许多其它工具中）。

{* ../../docs_src/background_tasks/tutorial002_an_py310.py hl[13,15,22,25] *}


In this example, the messages will be written to the `log.txt` file *after* the response is sent.

If there was a query in the request, it will be written to the log in a background task.

And then another background task generated at the *path operation function* will write a message using the `email` path parameter.

## Technical Details

    }
  }

  /**
   * Returns an unmodifiable view of the specified table. This method allows modules to provide
   * users with "read-only" access to internal tables. Query operations on the returned table "read
   * through" to the specified table, and attempts to modify the returned table, whether direct or
   * via its collection views, result in an {@code UnsupportedOperationException}.
   *

</p>
<p align="center">
    FastAPI 框架，高性能，易于学习，高效编码，生产可用
</p>
<p align="center">
<a href="https://github.com/fastapi/fastapi/actions?query=workflow%3ATest" target="_blank">
    <img src="https://github.com/fastapi/fastapi/workflows/Test/badge.svg" alt="Test">
</a>
<a href="https://codecov.io/gh/fastapi/fastapi" target="_blank">

# Testando Dependências com Sobreposição (Overrides)

## Sobrepondo dependências durante os testes

Existem alguns cenários onde você deseje sobrepor uma dependência durante os testes.

Você não quer que a dependência original execute (e nenhuma das subdependências que você possa ter).

         "type": "timeseries"
      }
   ],
   "refresh": "15s",
   "schemaVersion": 39,
   "templating": {
      "list": [
         {
            "name": "datasource",
            "query": "prometheus",
            "type": "datasource"
         }
      ]
   },
   "time": {
      "from": "now-30m",
      "to": "now"
   },
   "timezone": "utc",
   "title": "Istio Ztunnel Dashboard",

import org.codelibs.fess.util.MemoryUtil;
import org.codelibs.fess.util.ThreadDumpUtil;
import org.opensearch.action.search.SearchRequestBuilder;
import org.opensearch.index.query.QueryBuilder;
import org.opensearch.index.query.QueryBuilders;
import org.opensearch.search.sort.SortOrder;

import jakarta.annotation.PostConstruct;
import jakarta.annotation.PreDestroy;
import jakarta.annotation.Resource;

		t.Fatalf("Failed to create product, got error: %v", err)
	}

	var result Product2
	if err := DB.First(&result, "name = ?", "Nice").Error; err != nil {
		t.Fatalf("Failed to query product, got error: %v", err)
	}

	var resultClone Product2
	if err := DB.First(&resultClone, "name = ?", "Nice_clone").Error; err != nil {
		t.Fatalf("Failed to find cloned product, got error: %v", err)
	}

    open fun <T> tag(
      type: Class<in T>,
      tag: T?,
    ) = commonTag(type.kotlin, tag)

    /**
     * Override the [Request.url] for caching, if it is either polluted with
     * transient query params, or has a canonical URL possibly for a CDN.
     *
     * Note that POST requests will not be sent to the server if this URL is set
     * and matches a cached response.
     */

@GwtIncompatible
@ElementTypesAreNonnullByDefault
public interface RangeSet<C extends Comparable> {
  // TODO(lowasser): consider adding default implementations of some of these methods

  // Query methods

  /** Determines whether any of this range set's member ranges contains {@code value}. */
  boolean contains(C value);

  /**