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/**

* Copyright 2016 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.Arrays;

import java.util.concurrent.TimeUnit;

import org.openjdk.jmh.annotations.*;

import org.openjdk.jmh.infra.Blackhole;

import rx.functions.*;

import rx.jmh.LatchedObserver;

/**

* Benchmark operators that consume their sources completely and signal a single value.

* <p>

* gradlew benchmarks "-Pjmh=-f 1 -tu s -bm thrpt -wi 5 -i 5 -r 1 .*DeferredScalarPerf.*"

* <p>

* gradlew benchmarks "-Pjmh=-f 1 -tu ns -bm avgt -wi 5 -i 5 -r 1 .*DeferredScalarPerf.*"

*/

@BenchmarkMode(Mode.Throughput)

@OutputTimeUnit(TimeUnit.SECONDS)

@State(Scope.Thread)

public class DeferredScalarPerf {

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

public int count;

Observable<Integer> last;

Observable<Integer> reduce;

Observable<Integer> reduceSeed;

Observable<int[]> collect;

@Setup

public void setup() {

Integer[] array = new Integer[count];

Arrays.fill(array, 777);

Observable<Integer> source = Observable.from(array);

reduce = source.reduce(new Func2<Integer, Integer, Integer>() {

@Override

public Integer call(Integer a, Integer b) {

return b;

}

});

reduceSeed = source.reduce(0, new Func2<Integer, Integer, Integer>() {

@Override

public Integer call(Integer a, Integer b) {

return b;

}

});

last = source.takeLast(1);

collect = source.collect(new Func0<int[]>() {

@Override

public int[] call() {

return new int[1];

}

}, new Action2<int[], Integer>() {

@Override

public void call(int[] a, Integer b) {

a[0] = b.intValue();

}

} );

}

@Benchmark

public void reduce(Blackhole bh) {

reduce.subscribe(new LatchedObserver<Integer>(bh));

}

@Benchmark

public void reduceSeed(Blackhole bh) {

reduceSeed.subscribe(new LatchedObserver<Integer>(bh));

}

@Benchmark

public void last(Blackhole bh) {

last.subscribe(new LatchedObserver<Integer>(bh));

}

@Benchmark

public void collect(Blackhole bh) {

collect.subscribe(new LatchedObserver<int[]>(bh));

}

}