private static final Splitter CHAR_SPLITTER = Splitter.on('X');
  private static final Splitter STRING_SPLITTER = Splitter.on("X");

  @BeforeExperiment
  void setUp() {
    input = Strings.repeat(text, length);
  }

  @Benchmark
  int charSplitter(int reps) {
    int total = 0;

    for (int i = 0; i < reps; i++) {
      total += Iterables.size(CHAR_SPLITTER.split(input));
    }

    return total;

  private static final Splitter CHAR_SPLITTER = Splitter.on('X');
  private static final Splitter STRING_SPLITTER = Splitter.on("X");

  @BeforeExperiment
  void setUp() {
    input = Strings.repeat(text, length);
  }

  @Benchmark
  int charSplitter(int reps) {
    int total = 0;

    for (int i = 0; i < reps; i++) {
      total += Iterables.size(CHAR_SPLITTER.split(input));
    }

    return total;