AutoCloseableBenchmark.java

//DEPS org.openjdk.jmh:jmh-generator-annprocess:1.36

// to run with javagagent add the following:
// `--javaagent=ap-loader@maxandersen=start,event=cpu,file=profile.html`

package red.hat.puzzles;

import java.util.concurrent.TimeUnit;

import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import org.openjdk.jmh.infra.Blackhole;

@State(Scope.Benchmark)
@Warmup(iterations = 10, time = 400, timeUnit = TimeUnit.MILLISECONDS)
@Measurement(iterations = 5, time = 200, timeUnit = TimeUnit.MILLISECONDS)
@Fork(2)
public class AutoCloseableBenchmark {

   public interface A {

   }

   public interface B {

   }

   public interface C {

   }

   public interface D {

   }

   public interface E {

   }

   public interface F {

   }

   public interface G {

   }

   private enum ManySecondarySupers implements A, B, C, D, E, F, G {
      Instance
   }

   private Object o;

   @Setup
   public void polluteTypeProfile(Blackhole bh) {
      o = ManySecondarySupers.Instance;
   }

   public static boolean close(Object o) {
      if (o instanceof AutoCloseable) {
         try {
            ((AutoCloseable) o).close();
            return true;
         } catch (Exception ignore) {
            return false;
         }
      } else {
         return false;
      }
   }

   @Benchmark
   public boolean closeNotAutoCloseable() {
      return close(o);
   }

}

run it with

$ jbang -m org.openjdk.jmh.Main https://gist.github.com/franz1981/e46823dbaeb576c1a3344683b2319db8 -prof "async:output=flamegraph;dir=/tmp;libPath=<YOUR PATH TO AP HERE>/libasyncProfiler.so"

And have fun!