src/perf/java/rx/operators/OperatorSerializePerf.java
/**
* Copyright 2014 Netflix, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package rx.operators;
import java.util.concurrent.TimeUnit;
import org.openjdk.jmh.annotations.*;
import org.openjdk.jmh.infra.Blackhole;
import rx.*;
import rx.Observable.OnSubscribe;
import rx.functions.Func1;
import rx.jmh.*;
import rx.schedulers.Schedulers;
@BenchmarkMode(Mode.Throughput)
@OutputTimeUnit(TimeUnit.SECONDS)
public class OperatorSerializePerf {
@State(Scope.Thread)
public static class Input extends InputWithIncrementingInteger {
@Param({ "1", "1000", "1000000" })
public int size;
@Override
public int getSize() {
return size;
}
}
@Benchmark
public void noSerializationSingleThreaded(Input input) throws InterruptedException {
LatchedObserver<Integer> o = input.newLatchedObserver();
input.firehose.subscribe(o);
o.latch.await();
}
@Benchmark
public void serializedSingleStream(Input input) throws InterruptedException {
LatchedObserver<Integer> o = input.newLatchedObserver();
input.firehose.serialize().subscribe(o);
o.latch.await();
}
@Benchmark
public void serializedTwoStreamsHighlyContended(final Input input) throws InterruptedException {
LatchedObserver<Integer> o = input.newLatchedObserver();
Observable.unsafeCreate(new OnSubscribe<Integer>() {
@Override
public void call(Subscriber<? super Integer> s) {
// break the contract here and concurrently onNext
input.firehose.subscribeOn(Schedulers.computation()).unsafeSubscribe(s);
input.firehose.subscribeOn(Schedulers.computation()).unsafeSubscribe(s);
// they will be serialized after
}
}).serialize().subscribe(o);
o.latch.await();
}
@State(Scope.Thread)
public static class InputWithInterval extends InputWithIncrementingInteger implements Func1<Long, Integer> {
@Param({ "1", "1000" })
public int size;
public Observable<Integer> interval;
@Override
public int getSize() {
return size;
}
@Override
public void setup(Blackhole bh) {
super.setup(bh);
interval = Observable.interval(0, 1, TimeUnit.MILLISECONDS).take(size).map(this);
}
@Override
public Integer call(Long t1) {
return t1.intValue();
}
}
@Benchmark
public void serializedTwoStreamsSlightlyContended(final InputWithInterval input) throws InterruptedException {
LatchedObserver<Integer> o = input.newLatchedObserver();
Observable.unsafeCreate(new OnSubscribe<Integer>() {
@Override
public void call(Subscriber<? super Integer> s) {
// break the contract here and concurrently onNext
input.interval.subscribeOn(Schedulers.computation()).unsafeSubscribe(s);
input.interval.subscribeOn(Schedulers.computation()).unsafeSubscribe(s);
// they will be serialized after
}
}).serialize().subscribe(o);
o.latch.await();
}
@Benchmark
public void serializedTwoStreamsOneFastOneSlow(final InputWithInterval input) throws InterruptedException {
LatchedObserver<Integer> o = input.newLatchedObserver();
Observable.unsafeCreate(new OnSubscribe<Integer>() {
@Override
public void call(final Subscriber<? super Integer> s) {
// break the contract here and concurrently onNext
input.interval.subscribeOn(Schedulers.computation()).unsafeSubscribe(s);
input.firehose.subscribeOn(Schedulers.computation()).unsafeSubscribe(s);
// they will be serialized after
}
}).serialize().subscribe(o);
o.latch.await();
}
}