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 2.x

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FlattenCrossMapPerf.java

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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.*;

import java.util.concurrent.TimeUnit;

import org.openjdk.jmh.annotations.*;

import org.openjdk.jmh.infra.Blackhole;

import io.reactivex.functions.Function;

@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 FlattenCrossMapPerf {

@Param({ "1", "10", "100", "1000", "10000", "100000", "1000000" })

public int times;

Flowable<Integer> flowable;

Observable<Integer> observable;

@Setup

public void setup() {

Integer[] array = new Integer[times];

Arrays.fill(array, 777);

Integer[] arrayInner = new Integer[1000000 / times];

Arrays.fill(arrayInner, 888);

final Iterable<Integer> list = Arrays.asList(arrayInner);

flowable = Flowable.fromArray(array).flatMapIterable(new Function<Integer, Iterable<Integer>>() {

@Override

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

return list;

}

});

observable = Observable.fromArray(array).flatMapIterable(new Function<Integer, Iterable<Integer>>() {

@Override

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

return list;

}

});

}

@Benchmark

public void flowable(Blackhole bh) {

flowable.subscribe(new PerfConsumer(bh));

}

@Benchmark

public void observable(Blackhole bh) {

observable.subscribe(new PerfConsumer(bh));

}

}