gistfile1.txt

@BenchmarkMode(Mode.AverageTime)
@Warmup(iterations = 5)
@Measurement(iterations = 5)
@Fork(3)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@State(Scope.Benchmark)
public class MyBenchmark {

    private static class TestActor extends UntypedActor {
        @Override
        public void onReceive(Object message) throws Throwable {}
    }

    ActorSystem system;
    Seq<Object> s;
    String templateWith3Args;
    LoggingAdapter adapter;
    List<String> args;

    @Setup(Level.Iteration)
    public void prepare() {
        system = ActorSystem.apply("test");
        args = Arrays.asList("argument1", "argument2", "argument3");
        s = scala.collection.JavaConverters.asScalaIteratorConverter(args.iterator()).asScala().toSeq();
        templateWith3Args = "{} some text {} another text {} someAnotherText";
        adapter = Logging.getLogger(system, system.actorOf(Props.create(TestActor.class)));
    }

    @TearDown(Level.Iteration)
    public void tearDown() {
        system.terminate();
    }

    @Benchmark
    public String akkaFormat() {
        return adapter.format(templateWith3Args, s);
    }

    @Benchmark
    public String simpleFormat() {
        return new StringBuilder(args.get(0))
                .append(" some text ")
                .append(args.get(1))
                .append(" another text ")
                .append(args.get(2))
                .append(" someAnotherText")
                .toString();
    }
}