FastThreadLocalSlowPathBenchmark Class — netty Architecture

Source Code

microbench/src/main/java/io/netty/microbench/concurrent/FastThreadLocalSlowPathBenchmark.java lines 30–76

@Threads(4)
@Measurement(iterations = 10, batchSize = 100)
public class FastThreadLocalSlowPathBenchmark extends AbstractMicrobenchmark {

    private static final Random rand = new Random();

    @SuppressWarnings("unchecked")
    private static final ThreadLocal<Integer>[] jdkThreadLocals = new ThreadLocal[128];
    @SuppressWarnings("unchecked")
    private static final FastThreadLocal<Integer>[] fastThreadLocals = new FastThreadLocal[jdkThreadLocals.length];

    static {
        for (int i = 0; i < jdkThreadLocals.length; i ++) {
            final int num = rand.nextInt();
            jdkThreadLocals[i] = new ThreadLocal<Integer>() {
                @Override
                protected Integer initialValue() {
                    return num;
                }
            };
            fastThreadLocals[i] = new FastThreadLocal<Integer>() {
                @Override
                protected Integer initialValue() {
                    return num;
                }
            };
        }
    }

    public FastThreadLocalSlowPathBenchmark() {
        super(true, true);
    }

    @Benchmark
    public void jdkThreadLocalGet(Blackhole bh) {
        for (ThreadLocal<Integer> i: jdkThreadLocals) {
            bh.consume(i.get());
        }
    }

    @Benchmark
    public void fastThreadLocal(Blackhole bh) {
        for (FastThreadLocal<Integer> i: fastThreadLocals) {
            bh.consume(i.get());
        }
    }
}