AbstractReferenceCountedByteBufBenchmark Class — netty Architecture

Source Code

microbench/src/main/java/io/netty/buffer/AbstractReferenceCountedByteBufBenchmark.java lines 34–94

@State(Scope.Benchmark)
public class AbstractReferenceCountedByteBufBenchmark extends AbstractMicrobenchmark {

    @Param({
            "0",
            "1",
            "10",
            "100",
            "1000",
            "10000",
    })
    public int delay;

    AbstractReferenceCountedByteBuf buf;

    @Setup
    public void setUp() {
        buf = (AbstractReferenceCountedByteBuf) Unpooled.buffer(1);
    }

    @TearDown
    public void tearDown() {
        buf.release();
    }

    @Benchmark
    @BenchmarkMode(Mode.AverageTime)
    @OutputTimeUnit(TimeUnit.NANOSECONDS)
    public boolean retainReleaseUncontended() {
        buf.retain();
        delay();
        return buf.release();
    }

    private void delay() {
        if (delay > 0) {
            Blackhole.consumeCPU(delay);
        }
    }

    @Benchmark
    @BenchmarkMode(Mode.AverageTime)
    @OutputTimeUnit(TimeUnit.NANOSECONDS)
    @CompilerControl(CompilerControl.Mode.DONT_INLINE)
    public boolean createUseAndRelease(Blackhole useBuffer) {
        ByteBuf unpooled = Unpooled.buffer(1);
        useBuffer.consume(unpooled);
        delay();
        return unpooled.release();
    }

    @Benchmark
    @BenchmarkMode(Mode.AverageTime)
    @OutputTimeUnit(TimeUnit.NANOSECONDS)
    @GroupThreads(4)
    public boolean retainReleaseContended() {
        buf.retain();
        delay();
        return buf.release();
    }
}