/**
* 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;
import java.util.concurrent.*;
import org.openjdk.jmh.annotations.*;
import org.openjdk.jmh.infra.Blackhole;
import rx.functions.Func1;
import rx.schedulers.Schedulers;
/**
* Benchmark Single.
*
* gradlew benchmarks "-Pjmh=-f 1 -tu s -bm thrpt -wi 5 -i 5 -r 1 .*SingleSourcePerf.*"
*
* gradlew benchmarks "-Pjmh=-f 1 -tu ns -bm avgt -wi 5 -i 5 -r 1 .*SingleSourcePerf.*"
*/
@BenchmarkMode(Mode.Throughput)
@OutputTimeUnit(TimeUnit.SECONDS)
@State(Scope.Thread)
public class SingleSourcePerf {
Single source;
Single flatmapped;
Single flatmappedConst;
Single sourceObserveOn;
Single sourceSubscribeOn;
Single sourceObserveOnExecutor;
Single sourceSubscribeOnExecutor;
Single sourceObserveOnScheduledExecutor;
Single sourceSubscribeOnScheduledExecutor;
// Single sourceObserveOnFJ;
// Single sourceSubscribeOnFJ;
ScheduledExecutorService scheduledExecutor;
ExecutorService executor;
@Setup
public void setup() {
source = Single.just(1);
flatmapped = source.flatMap(new Func1>() {
@Override
public Single call(Integer t) {
return Single.just(t);
}
});
flatmapped = source.flatMap(new Func1>() {
@Override
public Single call(Integer t) {
return source;
}
});
sourceObserveOn = source.observeOn(Schedulers.computation());
sourceSubscribeOn = source.subscribeOn(Schedulers.computation());
// ----------
scheduledExecutor = Executors.newScheduledThreadPool(1);
Scheduler s = Schedulers.from(scheduledExecutor);
sourceObserveOnScheduledExecutor = source.observeOn(s);
sourceSubscribeOnScheduledExecutor = source.subscribeOn(s);
// ----------
executor = Executors.newSingleThreadExecutor();
Scheduler se = Schedulers.from(executor);
sourceObserveOnExecutor = source.observeOn(se);
sourceSubscribeOnExecutor = source.subscribeOn(se);
// --------
// Scheduler fj = Schedulers.from(ForkJoinPool.commonPool());
// sourceObserveOnFJ = source.observeOn(fj);
// sourceSubscribeOnFJ = source.subscribeOn(fj);
}
@TearDown
public void teardown() {
scheduledExecutor.shutdownNow();
executor.shutdownNow();
}
static final class PlainSingleSubscriber extends SingleSubscriber {
final Blackhole bh;
public PlainSingleSubscriber(Blackhole bh) {
this.bh = bh;
}
@Override
public void onSuccess(Object value) {
bh.consume(value);
}
@Override
public void onError(Throwable error) {
bh.consume(error);
}
}
static final class LatchedSingleSubscriber extends SingleSubscriber {
final Blackhole bh;
final CountDownLatch cdl;
public LatchedSingleSubscriber(Blackhole bh) {
this.bh = bh;
this.cdl = new CountDownLatch(1);
}
@Override
public void onSuccess(Object value) {
bh.consume(value);
cdl.countDown();
}
@Override
public void onError(Throwable error) {
bh.consume(error);
cdl.countDown();
}
public void await() {
try {
cdl.await();
} catch (InterruptedException ex) {
throw new RuntimeException(ex);
}
}
public void awaitSpin() {
while (cdl.getCount() != 0L) ;
}
}
@Benchmark
public void direct(Blackhole bh) {
source.subscribe(new PlainSingleSubscriber(bh));
}
@Benchmark
public void flatmap(Blackhole bh) {
flatmapped.subscribe(new PlainSingleSubscriber(bh));
}
@Benchmark
public void flatmapConst(Blackhole bh) {
flatmapped.subscribe(new PlainSingleSubscriber(bh));
}
@Benchmark
public void observeOn(Blackhole bh) {
LatchedSingleSubscriber o = new LatchedSingleSubscriber(bh);
sourceObserveOn.subscribe(o);
o.awaitSpin();
}
@Benchmark
public void observeOnExec(Blackhole bh) {
LatchedSingleSubscriber o = new LatchedSingleSubscriber(bh);
sourceObserveOnExecutor.subscribe(o);
o.awaitSpin();
}
@Benchmark
public void subscribeOn(Blackhole bh) {
LatchedSingleSubscriber o = new LatchedSingleSubscriber(bh);
sourceSubscribeOn.subscribe(o);
o.awaitSpin();
}
@Benchmark
public void subscribeOnExec(Blackhole bh) {
LatchedSingleSubscriber o = new LatchedSingleSubscriber(bh);
sourceSubscribeOnExecutor.subscribe(o);
o.awaitSpin();
}
@Benchmark
public void subscribeOnSchExec(Blackhole bh) {
LatchedSingleSubscriber o = new LatchedSingleSubscriber(bh);
sourceSubscribeOnScheduledExecutor.subscribe(o);
o.awaitSpin();
}
// @Benchmark
// public void subscribeOnFJ(Blackhole bh) {
// LatchedSingleSubscriber o = new LatchedSingleSubscriber(bh);
//
// sourceSubscribeOnFJ.subscribe(o);
//
// o.awaitSpin();
// }
@Benchmark
public void observeOnSchExec(Blackhole bh) {
LatchedSingleSubscriber o = new LatchedSingleSubscriber(bh);
sourceObserveOnScheduledExecutor.subscribe(o);
o.awaitSpin();
}
// @Benchmark
// public void observeOnFJ(Blackhole bh) {
// LatchedSingleSubscriber o = new LatchedSingleSubscriber(bh);
//
// sourceObserveOnFJ.subscribe(o);
//
// o.awaitSpin();
// }
}