// which cause by calling Close and executing SQL concurrently
	if db.Stmts == nil {
		db.Mux.Unlock()
		return Stmt{}, ErrInvalidDB
	}
	// cache preparing stmt first
	cacheStmt := Stmt{Transaction: isTransaction, prepared: make(chan struct{})}
	db.Stmts[query] = &cacheStmt
	db.Mux.Unlock()

	// prepare completed
	defer close(cacheStmt.prepared)

	// map for bucket metrics and handle them specially.

	// Add the serverName and poolIndex labels to all non-cluster metrics.
	//
	// Also create metric group maps and set the cache.
	metricsCache := newMetricsCache()
	mgMap := make(map[collectorPath]*MetricsGroup)
	bucketMGMap := make(map[collectorPath]*MetricsGroup)
	for _, mg := range allMetricGroups {

	// profitable. To achieve this we create a goroutine per-proc.
	// These goroutines access considerable amount of local data so that
	// unnecessary rescheduling is penalized by cache misses.
	m := NewDRWMutex(ds, "")
	var acc0, acc1 uint64
	b.RunParallel(func(pb *testing.PB) {
		var data [16 << 10]uint64
		for i := 0; pb.Next(); i++ {
			m.Lock(id, source)
			acc0 -= 100
			acc1 += 100

        }
    }

/**
 * Reads a byte of data from this input stream.
 *
 * @throws IOException if a network error occurs
 */

    public int read() throws IOException {
        // need oplocks to cache otherwise use BufferedInputStream
        if( read( tmp, 0, 1 ) == -1 ) {
            return -1;
        }
        return tmp[0] & 0xFF;
    }

/**

func (sys *IAMSys) getStoredLDAPPolicyMappingKeys(ctx context.Context, isGroup bool) set.StringSet {
	entityKeysInStorage := set.NewStringSet()
	cache := sys.store.rlock()
	defer sys.store.runlock()
	cachedPolicyMap := cache.iamSTSPolicyMap
	if isGroup {
		cachedPolicyMap = cache.iamGroupPolicyMap
	}
	cachedPolicyMap.Range(func(k string, v MappedPolicy) bool {
		entityKeysInStorage.Add(k)
		return true
	})

     */
    @Nonnull
    Optional<Boolean> noTransferProgress();

    /**
     * Indicates whether Maven should cache the "not found" status of artifacts that were not found in remote repositories.
     *
     * @return an {@link Optional} containing true if "not found" status should be cached, false if not, or empty if not specified
     */
    @Nonnull
    Optional<Boolean> cacheArtifactNotFound();

    /**

import java.util.Set;

/**
 * Utilities for collecting and validating tester requirements from annotations.
 *
 * @author George van den Driessche
 */
@GwtIncompatible
public final class FeatureUtil {
  /** A cache of annotated objects (typically a Class or Method) to its set of annotations. */
  private static final Map<AnnotatedElement, List<Annotation>> annotationCache = new HashMap<>();

   1. The most common method (pictured above) is to sign a new certificate by calling the configured CA. Typically, this is Istiod.
   1. If the certificate is not yet expired, the `SecretManager` also can return a cache response. In practice, this would
       only happen in cases where Envoy were to re-request a resource, which is fairly rare.
   1. `SecretManager` can also read certificates from files. When this is configured, no CA client is used.

                SortBuilders.fieldSort(CREATE_TIME).order(SortOrder.ASC));
    }

    @Override
    public void saveSession(final String sessionId) {
        // TODO use cache
    }

    @Override
    public boolean visited(final OpenSearchUrlQueue urlQueue) {
        final String url = urlQueue.getUrl();
        if (StringUtil.isBlank(url)) {

			<artifactId>httpmime</artifactId>
			<version>${httpcomponents.version}</version>
		</dependency>
		<dependency>
			<groupId>org.apache.httpcomponents</groupId>
			<artifactId>httpclient-cache</artifactId>
			<version>${httpcomponents.version}</version>
		</dependency>
		<dependency>
			<groupId>jakarta.annotation</groupId>
			<artifactId>jakarta.annotation-api</artifactId>