import org.codelibs.core.misc.Base64Util;

/**
 * A high-performance utility class for encrypting and decrypting data using cached {@link Cipher} instances.
 * <p>
 * This class provides efficient encryption/decryption by pooling and reusing cipher instances,
 * reducing the overhead of repeated cipher initialization. It supports both string-based keys

   *     {@link #get(Object)}; may contain duplicates), in an increasing index order.
   */
  public Iterable<L> bulkGet(Iterable<? extends Object> keys) {
    // Initially using the list to store the keys, then reusing it to store the respective L's
    List<Object> result = newArrayList(keys);
    if (result.isEmpty()) {
      return ImmutableList.of();
    }
    int[] stripes = new int[result.size()];

                LeaseEntry entry = leases.get(existingKey);
                if (entry != null && !entry.breaking) {
                    entry.lastAccessTime = System.currentTimeMillis();
                    log.debug("Reusing existing lease for path: {}", path);
                    return existingKey;
                }
            }

            // Check if we've reached max leases

                    log.debug("Error while checking for reuse", e);
                    continue;
                }

                if (log.isTraceEnabled()) {
                    log.trace("Reusing transport connection " + conn);
                }
                return conn.acquire();
            }
        }

        return null;
    }

    @Override

 * group, and symbolic links.
 *
 * <p>
 * The class uses Apache Commons Net library for FTP communication. It maintains a queue of FTPClient
 * instances to improve performance by reusing connections.
 * </p>
 *
 * <p>
 * The client can be configured with FTP-specific settings via init parameters, such as:
 * </p>
 * <ul>

        while (iter.hasNext()) {
            final SmbSessionImpl ssn = iter.next();
            if (ssn.matches(tf, targetHost, targetDomain)) {
                if (log.isTraceEnabled()) {
                    log.trace("Reusing existing session " + ssn);
                }
                return ssn.acquire();
            }
            if (log.isTraceEnabled()) {

 *
 * OkHttp performs best when you create a single `OkHttpClient` instance and reuse it for all of
 * your HTTP calls. This is because each client holds its own connection pool and thread pools.
 * Reusing connections and threads reduces latency and saves memory. Conversely, creating a client
 * for each request wastes resources on idle pools.
 *
 * Use `new OkHttpClient()` to create a shared instance with the default settings:
 *

	// is too large we are basically just thrashing the CPU D-cache.
	// So if the result length is larger than an empirically-found
	// limit (8KB), we stop growing the source string once the limit
	// is reached and keep reusing the same source string - that
	// should therefore be always resident in the L1 cache - until we
	// have completed the construction of the result.
	// This yields significant speedups (up to +100%) in cases where

				dst = make([]byte, 0, hdr.Length+hdr.Length>>3)
			}
			if !hdr.Fin {
				hdr.Length = -1
			}
			return readAllInto(dst[:0], &wsReader, hdr.Length)
		}
	}

	// Keep reusing the same buffer.
	var msg []byte
	for atomic.LoadUint32((*uint32)(&c.state)) == StateConnected {
		if cap(msg) > readBufferSize*4 {
			// Don't keep too much memory around.
			msg = nil
		}

 * automatic-closing approach described above is safer.
 *
 * @param <V> the type of the value of this step
 * @since 30.0
 */
// TODO(dpb): Consider reusing one CloseableList for the entire pipeline, modulo combinations.
@DoNotMock("Use ClosingFuture.from(Futures.immediate*Future)")
@J2ktIncompatible
@GwtIncompatible // TODO(dpb): GWT compatibility.