- Added `apiserver.latency.k8s.io/authentication` annotation to the audit log to record the
  time spent authenticating slow requests. Also added `apiserver.latency.k8s.io/authorization`
  annotation to record the time spent authorizing slow requests. ([#130571](https://github.com/kubernetes/kubernetes/pull/130571), [@hakuna-matatah](https://github.com/hakuna-matatah))

- Scheduler: in 1.29 pre-releases, enabling contextual logging slowed down pod scheduling. ([#121715](https://github.com/kubernetes/kubernetes/pull/121715), [@pohly](https://github.com/pohly)) [SIG Instrumentation and Scheduling]

		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrInvalidRequest), r.URL)
		return
	}
	setEventStreamHeaders(w)

	// Trace Publisher and peer-trace-client uses nonblocking send and hence does not wait for slow receivers.
	// Keep 100k buffered channel.
	// If receiver cannot keep up with that we drop events.
	traceCh := make(chan []byte, 100000)
	peers, _ := newPeerRestClients(globalEndpoints)

import org.junit.jupiter.api.AfterEach
import org.junit.jupiter.api.Assertions.assertArrayEquals
import org.junit.jupiter.api.Tag
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.Timeout

@Timeout(5)
@Tag("Slow")
class Http2ConnectionTest {
  private val peer = MockHttp2Peer()
  private val taskFaker = TaskFaker()

  @AfterEach fun tearDown() {
    peer.close()
    taskFaker.close()
  }

				dstBuf, err = xioutil.ReadFile(dstFilePath)
				if err != nil && !osIsNotExist(err) {
					return res, osErrToFileErr(err)
				}
			}
		}
	}

	// Preserve all the legacy data, could be slow, but at max there can be 10,000 parts.
	currentDataPath := pathJoin(dstVolumeDir, dstPath)

	var xlMeta xlMetaV2
	var legacyPreserved bool
	var legacyEntries []string
	if len(dstBuf) > 0 {

- Kubeadm: increase robustness for "kubeadm join" when adding etcd members on slower setups ([#90645](https://github.com/kubernetes/kubernetes/pull/90645), [@neolit123](https://github.com/neolit123)) [SIG Cluster Lifecycle]

import okio.use
import org.junit.jupiter.api.AfterEach
import org.junit.jupiter.api.BeforeEach
import org.junit.jupiter.api.Tag
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.extension.RegisterExtension

@Tag("Slow")
class CacheTest {
  val fileSystem = FakeFileSystem()

  @RegisterExtension
  val clientTestRule = OkHttpClientTestRule()

  @RegisterExtension
  val platform = PlatformRule()

  @StartStop

* AWS now checks for validity of ecryption key when creating encrypted volumes. Dynamic provisioning of encrypted volume may get slower due to these checks. ([#65223](https://github.com/kubernetes/kubernetes/pull/65223), [@jsafrane](https://github.com/jsafrane))

- Removed an incorrect `SessionAffinity` warning that appeared when a headless service was created or updated. ([#134054](https://github.com/kubernetes/kubernetes/pull/134054), [@Peac36](https://github.com/Peac36))

import org.junit.jupiter.api.extension.RegisterExtension
import org.junit.jupiter.api.io.TempDir
import org.opentest4j.TestAbortedException

/** Android's URLConnectionTest, ported to exercise OkHttp's Call API.  */
@Tag("Slow")
class URLConnectionTest {
  @RegisterExtension
  val platform = PlatformRule()

  @RegisterExtension
  val clientTestRule = OkHttpClientTestRule()

  @TempDir
  lateinit var tempDir: File