Examples with Fork org.openjdk.jmh.annotations.Fork used on opensource projects

Example 11 with Fork

use of org.openjdk.jmh.annotations.Fork in project cyclops by aol.

the class ShakespearePlaysScrabbleWithStreams method measureThroughput.

@SuppressWarnings("unused")
@Benchmark
@BenchmarkMode(Mode.SampleTime)
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@Warmup(iterations = 5)
@Measurement(iterations = 5)
@Fork(1)
public List<Entry<Integer, List<String>>> measureThroughput() {
    // Function to compute the score of a given word
    IntUnaryOperator scoreOfALetter = letter -> letterScores[letter - 'a'];
    // score of the same letters in a word
    ToIntFunction<Entry<Integer, Long>> letterScore = entry -> letterScores[entry.getKey() - 'a'] * Integer.min(entry.getValue().intValue(), scrabbleAvailableLetters[entry.getKey() - 'a']);
    // Histogram of the letters in a given word
    Function<String, Map<Integer, Long>> histoOfLetters = word -> word.chars().boxed().collect(Collectors.groupingBy(Function.identity(), Collectors.counting()));
    // number of blanks for a given letter
    ToLongFunction<Entry<Integer, Long>> blank = entry -> Long.max(0L, entry.getValue() - scrabbleAvailableLetters[entry.getKey() - 'a']);
    // number of blanks for a given word
    Function<String, Long> nBlanks = word -> histoOfLetters.apply(word).entrySet().stream().mapToLong(blank).sum();
    // can a word be written with 2 blanks?
    Predicate<String> checkBlanks = word -> nBlanks.apply(word) <= 2;
    // score taking blanks into account
    Function<String, Integer> score2 = word -> histoOfLetters.apply(word).entrySet().stream().mapToInt(letterScore).sum();
    // Placing the word on the board
    // Building the streams of first and last letters
    Function<String, IntStream> first3 = word -> word.chars().limit(3);
    Function<String, IntStream> last3 = word -> word.chars().skip(Integer.max(0, word.length() - 4));
    // Stream to be maxed
    Function<String, IntStream> toBeMaxed = word -> Stream.of(first3.apply(word), last3.apply(word)).flatMapToInt(Function.identity());
    // Bonus for double letter
    ToIntFunction<String> bonusForDoubleLetter = word -> toBeMaxed.apply(word).map(scoreOfALetter).max().orElse(0);
    // score of the word put on the board
    Function<String, Integer> score3 = word -> (score2.apply(word) + bonusForDoubleLetter.applyAsInt(word)) + (score2.apply(word) + bonusForDoubleLetter.applyAsInt(word)) + (word.length() == 7 ? 50 : 0);
    Function<Function<String, Integer>, Stream<Map<Integer, List<String>>>> buildHistoOnScore = score -> Stream.of(buildShakerspeareWordsStream().filter(scrabbleWords::contains).filter(// filter out the words that needs more than 2 blanks
    checkBlanks).collect(Collectors.groupingBy(score, () -> new TreeMap<Integer, List<String>>(Comparator.reverseOrder()), Collectors.toList())));
    // best key / value pairs
    List<Entry<Integer, List<String>>> finalList = buildHistoOnScore.apply(score3).map(e -> e.entrySet().stream().limit(3).collect(Collectors.toList())).findAny().get();
    return finalList;
}