* - gcr.io/google-containers/etcd-empty-dir-cleanup
    * - gcr.io/google-containers/kube-dnsmasq-amd64
* Check if pathExists before performing Unmount ([#39311](https://github.com/kubernetes/kubernetes/pull/39311), [@rkouj](https://github.com/rkouj))

         * to support DFS referral _to_ Win95/98/ME.
         */

        // Optimization: Prefer SMB2 approach for better performance
        if (th.isSMB2()) {
            // SMB2: Use optimized open with minimal access for better performance
            return (SmbBasicFileInfo) withOpen(th, Smb2CreateRequest.FILE_OPEN, SmbConstants.FILE_READ_ATTRIBUTES,

   * are guarded by a lock and operations are applied in batches to avoid lock contention. The
   * penalty of applying the batches is spread across threads so that the amortized cost is slightly
   * higher than performing just the operation without enforcing the capacity constraint.
   *
   * This implementation uses a per-segment queue to record a memento of the additions, removals,

- Disabled the `SchedulerAsyncAPICalls` feature gate to mitigate a bug where its interaction with asynchronous preemption could degrade `kube-scheduler` performance, especially under high `kube-apiserver` load. ([#134400](https://github.com/kubernetes/kubernetes/pull/134400), [@macsko](https://github.com/macsko))

                .replace("__DEST_INDEX__", toIndex);
        return reindex(fromIndex, toIndex, source, waitForCompletion);
    }

    /**
     * Performs a reindex operation with custom source configuration.
     *
     * @param fromIndex        the source index name
     * @param toIndex          the destination index name

        return listFiles("*", ATTR_DIRECTORY | ATTR_HIDDEN | ATTR_SYSTEM, null, null);
    }

    /**
     * The CIFS protocol provides for DOS "wildcards" to be used as
     * a performance enhancement. The client does not have to filter
     * the names and the server does not have to return all directory
     * entries.
     * <p>
     * The wildcard expression may consist of two special meta

      SortedMap<K, V> unfiltered, Predicate<? super K> keyPredicate) {
    // TODO(lowasser): Return a subclass of FilteredKeyMap for slightly better performance.
    return filterEntries(unfiltered, keyPredicateOnEntries(keyPredicate));
  }

  /**
   * Returns a navigable map containing the mappings in {@code unfiltered} whose keys satisfy a

      SortedMap<K, V> unfiltered, Predicate<? super K> keyPredicate) {
    // TODO(lowasser): Return a subclass of FilteredKeyMap for slightly better performance.
    return filterEntries(unfiltered, keyPredicateOnEntries(keyPredicate));
  }

  /**
   * Returns a navigable map containing the mappings in {@code unfiltered} whose keys satisfy a

  }

  /**
   * Each OkHttpClient used to get its own instance of NullProxySelector, and because these weren't
   * equal their connections weren't pooled. That's a nasty performance bug!
   *
   * https://github.com/square/okhttp/issues/5519
   */
  @Test
  fun connectionPoolingWithFreshClientSamePool() {
    server.enqueue(MockResponse(body = "abc"))

* Upgrading Container-VM base image for k8s on GCE. Brief changelog as follows: ([#32738](https://github.com/kubernetes/kubernetes/pull/32738), [@Amey-D](https://github.com/Amey-D))
    * Fixed performance regression in veth device driver
    * Docker and related binaries are statically linked
    * Fixed the issue of systemd being oom-killable