MqttMessageTypeValueOfBench Class — netty Architecture

Source Code

microbench/src/main/java/io/netty/handler/codec/mqtt/MqttMessageTypeValueOfBench.java lines 29–148

@BenchmarkMode(Mode.AverageTime)
@Warmup(iterations = 5, time = 5)
@Measurement(iterations = 5, time = 5)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
public class MqttMessageTypeValueOfBench extends AbstractMicrobenchmark {

    private static final int[] DATASET = new int[] {
            9, 5, 2, 9, 8, 4, 3, 7, 7, 9, 6, 11, 10, 4, 10, 6, 12, 6, 14, 8, 2, 2, 5, 7, 13, 3, 10, 12, 6, 2, 8, 1, 6,
            4, 10, 8, 13, 9, 9, 2, 7, 12, 2, 3, 12, 9, 3, 12,
            11, 4, 10, 11, 9, 10, 5, 9, 4, 14, 6, 10, 13, 9, 12, 7, 5, 3, 1, 2, 7, 11, 1, 8, 4, 9, 5, 11, 14, 6, 3, 4,
            3, 1, 12, 9, 6, 1, 10, 2, 9, 5, 10, 4, 5, 1, 8,
            2, 11, 9, 7, 10, 14, 9, 12, 14, 6, 13, 6, 14, 6, 1, 3, 1, 10, 13, 13, 2, 2, 8, 7, 10, 9, 9, 4, 7, 13, 4, 10,
            3, 14, 14, 4, 3, 6, 7, 13, 13, 2, 3, 13, 5, 2,
            14, 11, 1, 5, 6, 14, 13, 12, 3, 9, 10, 1, 4, 1, 1, 13, 5, 8, 1, 8, 2, 7, 9, 14, 13, 2, 11, 10, 11, 5, 9, 13,
            13, 12, 11, 6, 1, 7, 11, 1, 11, 7, 8, 1, 13,
            12, 1, 5, 10, 2, 13, 4, 8, 2, 14, 8, 8, 9, 14, 12, 11, 1, 10, 6, 7, 2, 1, 12, 11, 8, 9, 10, 13, 2, 12, 3, 8,
            1, 13, 11, 8, 6, 4, 5, 8, 5, 12, 10, 9, 4, 7,
            2, 1, 11, 6, 7, 11, 5, 1, 5, 2, 7, 7, 14, 14, 3, 2, 1, 8, 5, 7, 4, 13, 13, 7, 8, 2, 14, 1, 12, 7, 8, 8, 3,
            9, 8, 1, 11, 10, 13, 10, 2, 1, 12, 5, 3, 3, 12, 5,
            7, 12, 13, 10, 14, 9, 2, 4, 12, 4, 10, 10, 2, 9, 2, 7, 5, 6, 2, 14, 10, 3, 4, 5, 8, 1, 14, 13, 1, 2, 5, 11,
            8, 6, 8, 3, 8, 13, 12, 8, 2, 12, 6, 2, 5, 4, 13,
            5, 11, 11, 5, 12, 9, 9, 9, 6, 4, 4, 11, 14, 12, 9, 3, 4, 12, 10, 10, 6, 3, 2, 12, 3, 2, 10, 8, 7, 10, 12,
            13, 1, 2, 7, 13, 2, 13, 4, 13, 14, 10, 14, 7, 5,
            11, 10, 9, 9, 1, 9, 10, 3, 9, 1, 13, 7, 9, 7, 1, 8, 14, 2, 6, 11, 2, 2, 11, 4, 10, 10, 9, 4, 4, 13, 7, 2, 1,
            4, 14, 6, 11, 5, 2, 5, 9, 5, 8, 4, 5, 6, 2, 12, 2,
            5, 2, 14, 3, 11, 5, 4, 14, 14, 2, 7, 7, 2, 3, 11, 2, 10, 9, 13, 3, 4, 2, 10, 1, 2, 10, 7, 7, 6, 8, 8, 12,
            14, 8, 13, 1, 9, 5, 9, 1, 14, 2, 5, 5, 5, 3, 13, 11,
            9, 6, 11, 1, 10, 13, 4, 7, 9, 6, 3, 4, 11, 8, 13, 3, 13, 12, 7, 7, 5, 9, 11, 3, 9, 6, 5, 6, 6, 11, 9, 2, 7,
            1, 12, 7, 5, 8, 11, 4, 9, 10, 11, 12, 7, 8, 1, 2,
            3, 14, 3, 9, 11, 9, 7, 4, 4, 4, 8, 4, 4, 2, 5, 8, 2, 11, 7, 13, 2, 14, 3, 6, 7, 14, 12, 6, 9, 11, 10, 9, 6,
            10, 6, 14, 4, 1, 7, 12, 4, 13, 10, 2, 2, 3, 3, 14,
            14, 2, 9, 12, 3, 9, 7, 6, 12, 8, 9, 5, 11, 13, 14, 14, 4, 1, 11, 14, 5, 9, 7, 14, 7, 13, 7, 14, 3, 14, 2, 8,
            2, 5, 10, 12, 14, 9, 11, 3, 14, 8, 12, 12, 5, 2,
            6, 2, 1, 14, 12, 8, 14, 1, 11, 14, 8, 9, 9, 1, 12, 13, 7, 8, 10, 5, 8, 5, 14, 13, 14, 3, 14, 2, 9, 12, 3,
            10, 3, 2, 4, 3, 5, 5, 10, 10, 13, 10, 7, 6, 4, 2, 10,
            8, 14, 2, 7, 1, 2, 7, 13, 2, 3, 6, 14, 3, 8, 12, 3, 4, 12, 6, 3, 10, 6, 14, 9, 1, 6, 3, 14, 7, 1, 7, 2, 12,
            9, 5, 9, 6, 13, 5, 11, 13, 11, 10, 1, 14, 9, 13, 8,
            12, 14, 14, 8, 13, 2, 6, 14, 2, 2, 9, 12, 9, 7, 2, 11, 4, 6, 8, 10, 12, 10, 11, 2, 9, 9, 5, 4, 3, 4, 4, 10,
            3, 1, 12, 13, 9, 8, 1, 9, 9, 4, 2, 7, 3, 4, 11, 11,
            8, 10, 14, 5, 14, 1, 10, 10, 13, 5, 6, 13, 14, 5, 7, 11, 4, 13, 3, 14, 7, 2, 10, 13, 2, 4, 14, 5, 1, 12, 3,
            13, 11, 2, 11, 14, 2, 5, 8, 13, 4, 13, 13, 3, 3,
            3, 13, 6, 11, 5, 3, 2, 13, 9, 2, 10, 8, 3, 11, 4, 6, 12, 14, 6, 2, 14, 1, 2, 6, 8, 4, 12, 8, 11, 9, 1, 7, 1,
            10, 4, 10, 9, 9, 3, 11, 5, 10, 8, 9, 4, 13, 4,
            5, 7, 12, 14, 12, 6, 1, 2, 10, 9, 10, 12, 1, 2, 6, 9, 5, 13, 4, 6, 11, 7, 1, 3, 10, 2, 1, 13, 14, 3, 5, 5,
            5, 7, 14, 9, 9, 3, 12, 1, 1, 1, 3, 12, 6, 9, 7, 8, 1,
            8, 2, 8, 13, 1, 11, 11, 1, 4, 10, 4, 3, 10, 3, 2, 2, 8, 2, 4, 13, 14, 4, 12, 14, 7, 6, 7, 13, 7, 11, 13, 12,
            14, 1, 14, 3, 4, 13, 12, 10, 5, 12, 12, 4, 5, 6,
            9, 12, 13, 3, 4, 13, 8, 14, 3, 2, 8, 5, 6, 13, 8, 7, 4, 5, 8, 14, 8, 14, 7, 5, 4, 9, 12, 12, 10, 3, 1, 12,
            5, 1, 11, 6, 10, 5, 14, 4, 5, 13, 8, 11, 13, 4, 9,
            9, 7, 6, 2, 2, 5, 12, 13, 13, 6, 11, 13, 12, 10, 6, 7, 1, 2, 6, 1, 9, 10, 14, 7, 9, 2, 2, 2, 8, 8, 11, 14,
            12, 9, 13, 1
    };

    int[] types;
    long next;
    long mask;

    @Setup
    public void initDataSet() {
        types = DATASET;
        next = 0;
        mask = types.length - 1;
        if (Integer.bitCount(types.length) != 1) {
            throw new AssertionError("The data set should contains power of 2 items");
        }
    }

    @Benchmark
    public MqttMessageType getViaArray() {
        long next = this.next;
        int nextIndex = (int) (next & mask);
        MqttMessageType type = MqttMessageType.valueOf(types[nextIndex]);
        this.next = next + 1;
        return type;
    }

    @Benchmark
    public MqttMessageType getViaSwitch() {
        long next = this.next;
        int nextIndex = (int) (next & mask);
        MqttMessageType type = switchValueOf(types[nextIndex]);