package jdk.test;

import org.openjdk.jmh.annotations.*;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Proxy;
import java.util.concurrent.Callable;
import java.util.concurrent.TimeUnit;

@BenchmarkMode(Mode.AverageTime)
@Warmup(iterations = 5)
@Measurement(iterations = 10)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@Fork(1)
@State(Scope.Thread)
public class ProxyBench {

    /*

jdk-8u66:

Benchmark                      Mode  Cnt    Score   Error  Units
ProxyBench.getProxyClass1i     avgt   10   24.316 ± 0.213  ns/op
ProxyBench.getProxyClass4i     avgt   10   90.730 ± 2.249  ns/op
ProxyBench.newProxyInstance1i  avgt   10   44.642 ± 0.403  ns/op
ProxyBench.newProxyInstance4i  avgt   10  381.764 ± 2.328  ns/op

jdk-9-ea+109:

Benchmark                      Mode  Cnt    Score   Error  Units
ProxyBench.getProxyClass1i     avgt   10   27.748 ± 0.333  ns/op
ProxyBench.getProxyClass4i     avgt   10   87.939 ± 1.809  ns/op
ProxyBench.newProxyInstance1i  avgt   10   58.348 ± 0.911  ns/op
ProxyBench.newProxyInstance4i  avgt   10  432.913 ± 9.915  ns/op

jdk-9-dev:

Benchmark                      Mode  Cnt     Score     Error  Units
ProxyBench.getProxyClass1i     avgt   10  1153.255 ±  11.710  ns/op
ProxyBench.getProxyClass4i     avgt   10  6062.040 ± 250.677  ns/op
ProxyBench.newProxyInstance1i  avgt   10  1547.119 ±  40.836  ns/op
ProxyBench.newProxyInstance4i  avgt   10  6386.511 ± 119.570  ns/op

jdk-9-dev + patch:

Benchmark                      Mode  Cnt   Score   Error  Units
ProxyBench.getProxyClass1i     avgt   10   7.765 ± 0.019  ns/op
ProxyBench.getProxyClass4i     avgt   10  64.194 ± 1.670  ns/op
ProxyBench.newProxyInstance1i  avgt   10  13.337 ± 0.334  ns/op
ProxyBench.newProxyInstance4i  avgt   10  67.073 ± 1.005  ns/op

     */

    interface PkgPrivate1 {
        void m1();
    }

    interface PkgPrivate2 {
        void m2();
    }

    static final InvocationHandler handler = (proxy, method, args) -> null;

    static final ClassLoader loader1 = null;
    static final Class<?>[] interfaces1 = {Runnable.class};

    static final ClassLoader loader4 = PkgPrivate1.class.getClassLoader();
    static final Class<?>[] interfaces4 = {Runnable.class, Callable.class,
                                           PkgPrivate1.class, PkgPrivate2.class};

    @Benchmark
    public Class<?> getProxyClass1i() {
        return Proxy.getProxyClass(loader1, interfaces1);
    }

    @Benchmark
    public Class<?> getProxyClass4i() {
        return Proxy.getProxyClass(loader4, interfaces4);
    }

    @Benchmark
    public Object newProxyInstance1i() {
        return Proxy.newProxyInstance(loader1, interfaces1, handler);
    }

    @Benchmark
    public Object newProxyInstance4i() {
        return Proxy.newProxyInstance(loader4, interfaces4, handler);
    }
}