ByteBufLastIndexOfBenchmark Class — netty Architecture

Source Code

microbench/src/main/java/io/netty/microbench/buffer/ByteBufLastIndexOfBenchmark.java lines 38–134

@State(Scope.Benchmark)
@OutputTimeUnit(TimeUnit.MICROSECONDS)
@Fork(2)
@Warmup(iterations = 5, time = 1)
@Measurement(iterations = 8, time = 1)
public class ByteBufLastIndexOfBenchmark extends AbstractMicrobenchmark {
    @Param({
            "7",
            "16",
            "23",
            "32",
    })
    int size;

    @Param({
            "4",
            "11",
    })
    int logPermutations;

    @Param({
            "1",
    })
    int seed;

    int permutations;

    ByteBuf[] data;

    private int i;

    @Param({
            "0",
    })
    private byte needleByte;

    @Param({
            "true",
            "false",
    })
    private boolean direct;

    @Param({
            "true",
            "false",
    })
    private boolean noUnsafe;

    @Param({
            "true",
            "false",
    })
    private boolean pooled;

    @Setup(Level.Trial)
    public void init() {
        System.setProperty("io.netty.noUnsafe", Boolean.valueOf(noUnsafe).toString());
        SplittableRandom random = new SplittableRandom(seed);
        permutations = 1 << logPermutations;
        this.data = new ByteBuf[permutations];
        final ByteBufAllocator allocator = pooled? PooledByteBufAllocator.DEFAULT : UnpooledByteBufAllocator.DEFAULT;
        for (int i = 0; i < permutations; ++i) {
            data[i] = direct? allocator.directBuffer(size, size) : allocator.heapBuffer(size, size);
            for (int j = 0; j < size; j++) {
                int value = random.nextInt(Byte.MIN_VALUE, Byte.MAX_VALUE + 1);
                // turn any found value into something different
                if (value == needleByte) {
                    if (needleByte != 1) {
                        value = 1;
                    } else {
                        value = 0;
                    }
                }
                data[i].setByte(j, value);
            }
            final int foundIndex = random.nextInt(0, Math.min(8, size));
            data[i].setByte(foundIndex, needleByte);
        }
    }

    private ByteBuf getData() {