Los benchmarks independientes de TechEmpower muestran aplicaciones de **FastAPI** ejecutándose bajo Uvicorn como [uno de los frameworks de Python más rápidos disponibles](https://www.techempower.com/benchmarks/#section=test&runid=7464e520-0dc2-473d-bd34-dbdfd7e85911&hw=ph&test=query&l=zijzen-7), solo por debajo de Starlette y Uvicorn en sí mismos (utilizados internamente por FastAPI).

Pero al revisar benchmarks y comparaciones, debes tener en cuenta lo siguiente.

import java.util.SortedMap;
import java.util.SortedSet;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.jspecify.annotations.NullUnmarked;
import org.jspecify.annotations.Nullable;

/**
 * Test suites for wrappers in {@code Maps}.
 *
 * @author Louis Wasserman
 */
@NullUnmarked
@AndroidIncompatible // test-suite builders
public class MapsCollectionTest extends TestCase {

          new BinaryPredicate<Double, Double>() {
            @Override
            public boolean apply(@Nullable Double actual, @Nullable Double expected) {
              // Test for equality to allow non-finite values to match; otherwise, use the finite
              // test.
              return actual.equals(expected)
                  || FINITE_QUANTILE_CORRESPONDENCE.compare(actual, expected);
            }
          },

          new BinaryPredicate<Double, Double>() {
            @Override
            public boolean apply(@Nullable Double actual, @Nullable Double expected) {
              // Test for equality to allow non-finite values to match; otherwise, use the finite
              // test.
              return actual.equals(expected)
                  || FINITE_QUANTILE_CORRESPONDENCE.compare(actual, expected);
            }
          },

	// A character used to truncate the object prefixes.
	// NOTE: only supported delimiter is '/'.
	Delimiter string

	// CommonPrefixes contains all (if there are any) keys between Prefix and the
	// next occurrence of the string specified by delimiter.
	CommonPrefixes []string

	EncodingType string // Not supported yet.
}

// TransitionedObject transitioned object tier and status.

  // We need to test that our method behaves like the JDK method.
  @SuppressWarnings("InlineMeInliner")
  public void testHashCode() {
    for (double value : VALUES) {
      assertThat(Doubles.hashCode(value)).isEqualTo(Double.hashCode(value));
    }
  }

  @SuppressWarnings("InlineMeInliner") // We need to test our method.
  public void testIsFinite() {

) : Cloneable {
  val headersList: List<Header>
    get() {
      val result = mutableListOf<Header>()
      for (inputHeader in headers) {
        val (key, value) = inputHeader.entries.iterator().next()
        result.add(Header(key, value))
      }
      return result
    }

  public override fun clone() = Case(seqno, this.wire, headers)

/**
 * Internal precommit plugins that adds elasticsearch project specific
 * checks to the common precommit plugin.
 */
public class InternalPrecommitTasks {
    /**
     * Adds a precommit task, which depends on non-test verification tasks.
     */
    public static void create(Project project, boolean withProductiveCode) {
        project.getPluginManager().apply(CheckstylePrecommitPlugin.class);

          black-list-target-branches:
            - 6.8
          excluded-regions:
            - ^docs/.*
          white-list-labels:
            - ':Delivery/Packaging'
          black-list-labels:
            - '>test-mute'
    axes:
      - axis:
          type: label-expression
          name: os
          values:
            - centos-8-packaging
            - ubuntu-20.04-packaging
      - axis:
          type: yaml

So, it will send the first item, the client will receive and start processing it, and you might still be producing the next item.

```mermaid
sequenceDiagram
    participant App
    participant Client

    App->>App: Produce Item 1
    App->>Client: Send Item 1
    App->>App: Produce Item 2
    Client->>Client: Process Item 1