for (i = 0; i < strideLimit; i += stride) {
          long lw = theUnsafe.getLong(left, BYTE_ARRAY_BASE_OFFSET + (long) i);
          long rw = theUnsafe.getLong(right, BYTE_ARRAY_BASE_OFFSET + (long) i);
          if (lw != rw) {
            if (BIG_ENDIAN) {
              return UnsignedLongs.compare(lw, rw);
            }

            /*
             * We want to compare only the first index where left[index] != right[index]. This

    static {
      Set<String> views = FileSystems.getDefault().supportedFileAttributeViews();
      if (views.contains("posix")) {
        filePermissions = () -> asFileAttribute(PosixFilePermissions.fromString("rw-------"));
        directoryPermissions = () -> asFileAttribute(PosixFilePermissions.fromString("rwx------"));
      } else if (views.contains("acl")) {
        filePermissions = directoryPermissions = userPermissions();

    assertTrue(Files.equal(asciiFile, temp));

    Files.copy(i18nFile, temp);
    assertTrue(Files.equal(i18nFile, temp));

    Files.copy(asciiFile, temp);
    RandomAccessFile rf = new RandomAccessFile(temp, "rw");
    rf.writeByte(0);
    rf.close();
    assertEquals(asciiFile.length(), temp.length());
    assertFalse(Files.equal(asciiFile, temp));

    assertTrue(Files.equal(asciiFile, temp));

    Files.copy(i18nFile, temp);
    assertTrue(Files.equal(i18nFile, temp));

    Files.copy(asciiFile, temp);
    RandomAccessFile rf = new RandomAccessFile(temp, "rw");
    rf.writeByte(0);
    rf.close();
    assertEquals(asciiFile.length(), temp.length());
    assertFalse(Files.equal(asciiFile, temp));

    checkNotNull(file);
    checkNotNull(mode);

    Closer closer = Closer.create();
    try {
      RandomAccessFile raf =
          closer.register(new RandomAccessFile(file, mode == MapMode.READ_ONLY ? "r" : "rw"));
      FileChannel channel = closer.register(raf.getChannel());
      return channel.map(mode, 0, size == -1 ? channel.size() : size);
    } catch (Throwable e) {
      throw closer.rethrow(e);
    } finally {