String[] prefix = {"f", "g"};
      String[] suffix = {"h", "i"};

      String[] all = new String[2 + elements.length + 2];
      arraycopy(prefix, 0, all, 0, 2);
      arraycopy(elements, 0, all, 2, elements.length);
      arraycopy(suffix, 0, all, 2 + elements.length, 2);

      return ImmutableList.copyOf(all).subList(2, elements.length + 2);
    }
  }

    int strCopyLen = len;
    int pos = 0;
    while (count != 0) {
      if ((count & 1) != 0) {
        System.arraycopy(strCopy, 0, array, pos, strCopyLen);
        pos += strCopyLen;
      }
      count >>= 1;
      if (count != 0) {
        System.arraycopy(strCopy, 0, strCopy, strCopyLen, strCopyLen);
        strCopyLen <<= 1;
      }
    }
    return new String(array);
  }

  @Benchmark

  public static <T extends @Nullable Object> T[] concat(
      T[] first, T[] second, Class<@NonNull T> type) {
    T[] result = newArray(type, first.length + second.length);
    arraycopy(first, 0, result, 0, first.length);
    arraycopy(second, 0, result, first.length, second.length);
    return result;
  }

  /**
   * Returns a new array that prepends {@code element} to {@code array}.
   *

      String[] prefix = {"f", "g"};
      String[] suffix = {"h", "i"};

      String[] all = new String[2 + elements.length + 2];
      arraycopy(prefix, 0, all, 0, 2);
      arraycopy(elements, 0, all, 2, elements.length);
      arraycopy(suffix, 0, all, 2 + elements.length, 2);

      return ImmutableList.copyOf(all).subList(2, elements.length + 2);
    }
  }

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect.testing;

import static java.lang.System.arraycopy;

import com.google.common.annotations.GwtCompatible;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.jspecify.annotations.NullMarked;

    int strCopyLen = len;
    int pos = 0;
    while (count != 0) {
      if ((count & 1) != 0) {
        System.arraycopy(strCopy, 0, array, pos, strCopyLen);
        pos += strCopyLen;
      }
      count >>= 1;
      if (count != 0) {
        System.arraycopy(strCopy, 0, strCopy, strCopyLen, strCopyLen);
        strCopyLen <<= 1;
      }
    }
    return new String(array);
  }

  @Benchmark

 * limitations under the License.
 */

package com.google.common.collect;

import static com.google.common.base.Preconditions.checkElementIndex;
import static java.lang.System.arraycopy;
import static java.util.Objects.requireNonNull;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect.testing;

import static java.lang.System.arraycopy;
import static java.util.Arrays.asList;

import com.google.common.annotations.GwtCompatible;
import java.util.AbstractCollection;
import java.util.Collection;
import java.util.Iterator;

    Object[] array = new Object[paramCount + others.length];
    arrayCopy(array, 0, e1, e2, e3, e4, e5, e6, e7, e8, e9, e10, e11, e12);
    arrayCopy(array, paramCount, others);
    return new RegularImmutableList<E>(ImmutableList.<E>nullCheckedList(array));
  }

  private static void arrayCopy(Object[] dest, int pos, Object... source) {
    System.arraycopy(source, 0, dest, pos, source.length);
  }

    }
  }

  private static Short[] concat(Short[] left, Short[] right) {
    Short[] result = new Short[left.length + right.length];
    System.arraycopy(left, 0, result, 0, left.length);
    System.arraycopy(right, 0, result, left.length, right.length);
    return result;
  }

  public abstract static class TestShortListGenerator implements TestListGenerator<Short> {
    @Override