assertThat(futureResult.toString())
        .matches(
            "CombinedFuture@\\w+\\[status=PENDING,"
                + " info=\\[futures=\\[SettableFuture@\\w+\\[status=PENDING],"
                + " SettableFuture@\\w+\\[status=PENDING]]]]");
    Integer integerPartial = 1;
    futureInteger.set(integerPartial);
    assertThat(futureResult.toString())
        .matches(
            "CombinedFuture@\\w+\\[status=PENDING,"

    assertThat(futureResult.toString())
        .matches(
            "CombinedFuture@\\w+\\[status=PENDING,"
                + " info=\\[futures=\\[SettableFuture@\\w+\\[status=PENDING],"
                + " SettableFuture@\\w+\\[status=PENDING]]]]");
    Integer integerPartial = 1;
    futureInteger.set(integerPartial);
    assertThat(futureResult.toString())
        .matches(
            "CombinedFuture@\\w+\\[status=PENDING,"

    for (int i = 0; i < reps; i++) {
      dummy += matcher.trimAndCollapseFrom(string, '!').length();
    }
    return dummy;
  }

  @Benchmark
  int matches(int reps) {
    int dummy = 0;
    for (int i = 0; i < reps; i++) {
      dummy += matcher.matches(string.charAt(i % string.length())) ? 1 : 0;
    }
    return dummy;
  }

  private static final String NONMATCHING_CHARS = "abcdefghijklmnopqrstuvwxyz0123456789";

    for (int i = 0; i < reps; i++) {
      dummy += matcher.trimAndCollapseFrom(string, '!').length();
    }
    return dummy;
  }

  @Benchmark
  int matches(int reps) {
    int dummy = 0;
    for (int i = 0; i < reps; i++) {
      dummy += matcher.matches(string.charAt(i % string.length())) ? 1 : 0;
    }
    return dummy;
  }

  private static final String NONMATCHING_CHARS = "abcdefghijklmnopqrstuvwxyz0123456789";