- **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

    /**
     * Returns an {@code ImmutableRangeMap} containing the associations previously added to this
     * builder.
     *
     * @throws IllegalArgumentException if any two ranges inserted into this builder overlap
     */
    public ImmutableRangeMap<K, V> build() {
      sort(entries, Range.<K>rangeLexOrdering().onKeys());
      ImmutableList.Builder<Range<K>> rangesBuilder = new ImmutableList.Builder<>(entries.size());

 * form}), the memory requirement is 8*N bytes for the copy of the dataset plus an overhead which is
 * independent of N (but depends on the quantiles being computed). When calling {@link
 * ScaleAndIndex#computeInPlace computeInPlace} (in {@linkplain ScaleAndIndexes#computeInPlace
 * either form}), only the overhead is required. The number of object allocations is independent of
 * N in both cases.
 *

 _init() {\n    this.remember()\n    this.autoCollapse()\n\n    $(window).resize(() => {\n      this.autoCollapse(true)\n    })\n  }\n\n  _addOverlay() {\n    const overlay = $('<div />', {\n      id: 'sidebar-overlay'\n    })\n\n    overlay.on('click', () => {\n      this.collapse()\n    })\n\n    $(SELECTOR_WRAPPER).append(overlay)\n  }\n\n  // Static\n\n  static _jQueryInterface(operation) {\n    return this.each(function () {\n      let data = $(this).data(DATA_KEY)\n      const _options = $.extend({},...

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    assertLockHeld()

    // If this connection is not accepting new exchanges, we're done.
    if (calls.size >= allocationLimit || noNewExchanges) return false

    // If the non-host fields of the address don't overlap, we're done.
    if (!this.route.address.equalsNonHost(address)) return false

    // If the host exactly matches, we're done: this connection can carry the address.
    if (address.url.host ==
      this

        byte[] decompressed = searchHelper.gzipDecompress(compressed);

        assertEquals(testData, new String(decompressed));
        // For small strings, gzip overhead might make compressed data larger
        // So we just verify that compression/decompression works correctly
        assertNotNull(compressed);
        assertTrue(compressed.length > 0);
    }

### Kubernetes Node system swap support

import java.util.concurrent.atomic.AtomicInteger;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/** Unit tests for CacheBuilder. */
@GwtCompatible
// We are intentionally testing the TimeUnit overloads, too.
@SuppressWarnings("LongTimeUnit_ExpireAfterWrite_Seconds")
@NullUnmarked
public class CacheBuilderTest extends TestCase {

  public void testNewBuilder() {

import java.util.concurrent.atomic.AtomicInteger;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/** Unit tests for CacheBuilder. */
@GwtCompatible
// We are intentionally testing the TimeUnit overloads, too.
@SuppressWarnings("LongTimeUnit_ExpireAfterWrite_Seconds")
@NullUnmarked
public class CacheBuilderTest extends TestCase {

  public void testNewBuilder() {