Test Pure Performance using openjdk jmh - Java Testing

Java examples for Testing:JDK jmh

  1. HOME
  2. Java
  3. Testing
  4. JDK jmh

Description

Test Pure Performance using openjdk jmh

Demo Code



import org.openjdk.jmh.annotations.*;
import org.openjdk.jmh.runner.Runner;
import org.openjdk.jmh.runner.RunnerException;
import org.openjdk.jmh.runner.options.Options;
import org.openjdk.jmh.runner.options.OptionsBuilder;

import java.util.concurrent.TimeUnit;


public class TestPurePerformance {
    public static final int[] threadsCountArray = new int[] { 1, 2, 4, 8,
            16, 32, 48, 64 };//from  www .java 2  s .c  o  m

    @State(Scope.Benchmark)
    public static class LongWrapper {
        long value = 0l;

        long incrementAndGet() {
            return ++value;
        }

        long get() {
            return value;
        }
    }

    @Benchmark
    @BenchmarkMode(Mode.SingleShotTime)
    @OutputTimeUnit(TimeUnit.MILLISECONDS)
    public Long incrementAtomicLoop(final LongWrapper longWrapper) {
        for (int i = 0; i < 1_000_000; i++) {
            longWrapper.incrementAndGet();
        }
        System.out.println("Value Pure Performance=" + longWrapper.get());
        return longWrapper.get();
    }

    public static void main(String[] args) throws RunnerException {
        for (final int threadsCount : threadsCountArray) {
            Options opt = new OptionsBuilder()
                    .include(TestPurePerformance.class.getSimpleName())
                    .jvmArgs("-server", "-Xmx2G").warmupIterations(10)
                    .measurementIterations(25).forks(1)
                    .threads(threadsCount).build();
            new Runner(opt).run();
        }
    }
}

Related Tutorials