this.maxReadSize =
                Math.min(maxBufferSize - Smb2ReadResponse.OVERHEAD, Math.min(tc.getConfig().getReceiveBufferSize(), this.maxReadSize))
                        & ~0x7;
        this.maxWriteSize =
                Math.min(maxBufferSize - Smb2WriteRequest.OVERHEAD, Math.min(tc.getConfig().getSendBufferSize(), this.maxWriteSize)) & ~0x7;

 */

package jcifs.smb1.smb1;

import jcifs.smb1.Config;

/**
 * Buffer cache implementation for SMB1 protocol operations.
 * Manages a pool of byte buffers to reduce garbage collection overhead.
 *
 * Performance optimizations:
 * - Uses ConcurrentLinkedQueue for O(1) operations
 * - Lock-free operations for better concurrency
 * - Proper buffer validation and limits
 */
public class BufferCache {

        assertTrue(response instanceof ServerMessageBlock2);
    }

    @Test
    @DisplayName("Test OVERHEAD constant value")
    void testOverheadConstant() {
        assertEquals(72, Smb2QueryInfoResponse.OVERHEAD);
        assertEquals(Smb2Constants.SMB2_HEADER_LENGTH + 8, Smb2QueryInfoResponse.OVERHEAD);
    }

    @ParameterizedTest
    @CsvSource({ "1, 6", // SMB2_0_INFO_FILE, FILE_INTERNAL_INFO

        System.out.printf("  Avg release time: %.2f ns%n", avgReleaseTimeNs);

        // Verify O(1) performance - should be reasonably fast (allowing for JVM overhead)
        assertTrue(avgAllocTimeNs < 10000, "Average allocation should be under 10000ns (O(1) performance)");
        assertTrue(avgReleaseTimeNs < 10000, "Average release should be under 10000ns (O(1) performance)");

 * type is determined by the crawler data serializer configuration.
 * </p>
 * <p>
 * The class is thread-safe and uses ThreadLocal to maintain Kryo instances
 * per thread to avoid synchronization overhead.
 * </p>
 *
 */
public class DataSerializer {

    /** Logger for this class. */
    private static final Logger logger = LogManager.getLogger(DataSerializer.class);

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * RDMA buffer manager for efficient memory region pooling.
 *
 * Manages pools of pre-registered memory regions to avoid the overhead
 * of frequent registration/deregistration during RDMA operations.
 */
public class RdmaBufferManager implements AutoCloseable {

    private static final Logger log = LoggerFactory.getLogger(RdmaBufferManager.class);

- **Memory efficient** - Specialized collections like `LruHashMap` and `ArrayMap` for memory-conscious applications
- **Java 21 features** - Switch expressions and pattern matching for reduced overhead

## 🧪 Building and Testing

### Development Setup
```bash
# Clone the repository
git clone https://github.com/codelibs/corelib.git
cd corelib

# Compile the project
mvn clean compile

/**
 * 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
 * and {@link Key} objects, with configurable algorithms and character encodings.
 * </p>
 * <p>
 * <strong>Key Features:</strong>
 * </p>
 * <ul>

     */
    int getListCount();

    /**
     *
     * Property {@code jcifs.smb.client.listSize} (int, default 65435)
     *
     * @return maximum data size for list/info requests (known overhead is subtracted)
     */
    int getListSize();

    /**
     *
     *
     * Property {@code jcifs.smb.client.attrExpirationPeriod} (int, 5000)
     *
     * @return timeout of file attribute cache

                        if (th.isSMB2()) {
                            try {
                                // Use FILE_READ_ATTRIBUTES only for minimal overhead
                                withOpen(th, Smb2CreateRequest.FILE_OPEN, SmbConstants.FILE_READ_ATTRIBUTES,