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/**

* Copyright (c) 2016-present, RxJava Contributors.

*

* 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 io.reactivex;

import java.util.Arrays;

import java.util.concurrent.TimeUnit;

import org.openjdk.jmh.annotations.*;

import org.reactivestreams.Publisher;

import io.reactivex.functions.*;

@BenchmarkMode(Mode.Throughput)

@Warmup(iterations = 5)

@Measurement(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)

@OutputTimeUnit(TimeUnit.SECONDS)

@Fork(value = 1)

@State(Scope.Thread)

public class ToFlowablePerf {

@Param({ "1", "1000", "1000000" })

public int times;

Maybe<Integer> flowable;

Flowable<Integer> flowableInner;

Observable<Integer> observable;

Observable<Integer> observableInner;

@Setup

public void setup() {

Integer[] array = new Integer[times];

Arrays.fill(array, 777);

Flowable<Integer> source = Flowable.fromArray(array);

final BiFunction<Integer, Integer, Integer> second = new BiFunction<Integer, Integer, Integer>() {

@Override

public Integer apply(Integer a, Integer b) throws Exception {

return b;

}

};

flowable = source.reduce(second);

flowableInner = source.concatMap(new Function<Integer, Publisher<Integer>>() {

@Override

public Publisher<Integer> apply(Integer v) throws Exception {

return Flowable.range(1, 50).reduce(second).toFlowable();

}

});

Observable<Integer> sourceObs = Observable.fromArray(array);

observable = sourceObs.reduce(second).toObservable();

observableInner = sourceObs.concatMap(new Function<Integer, Observable<Integer>>() {

@Override

public Observable<Integer> apply(Integer v) throws Exception {

return Observable.range(1, 50).reduce(second).toObservable();

}

});

}

@Benchmark

public Object flowable() {

return flowable.blockingGet();

}

@Benchmark

public Object flowableInner() {

return flowableInner.blockingLast();

}

@Benchmark

public Object observable() {

return observable.blockingLast();

}

@Benchmark

public Object observableInner() {

return observableInner.blockingLast();

}

static volatile Object o;

public static void main(String[] args) {

ToFlowablePerf p = new ToFlowablePerf();

p.times = 1000000;

p.setup();

for (int j = 0; j < 15; j++) {

for (int i = 0; i < 600; i++) {

o = p.flowable();

}

System.out.println("--- " + j);

}

}

}