src/perf/java/rx/operators/FlatMapRangePerf.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.Observable;
import rx.functions.Func1;
import rx.jmh.LatchedObserver;
/**
* Benchmark typical atomic operations on volatile fields and AtomicXYZ classes.
* <p>
* gradlew benchmarks "-Pjmh=-f 1 -tu s -bm thrpt -wi 5 -i 5 -r 1 .*FlatMapRangePerf.*"
* <p>
* gradlew benchmarks "-Pjmh=-f 1 -tu ns -bm avgt -wi 5 -i 5 -r 1 .*FlatMapRangePerf.*"
*/
@BenchmarkMode(Mode.Throughput)
@OutputTimeUnit(TimeUnit.SECONDS)
@State(Scope.Thread)
public class FlatMapRangePerf {
@Param({ "1", "10", "1000", "1000000" })
public int times;
Observable<Integer> rangeFlatMapJust;
Observable<Integer> rangeFlatMapRange;
@Setup
public void setup() {
Observable<Integer> range = Observable.range(1, times);
rangeFlatMapJust = range.flatMap(new Func1<Integer, Observable<Integer>>() {
@Override
public Observable<Integer> call(Integer v) {
return Observable.just(v);
}
});
rangeFlatMapRange = range.flatMap(new Func1<Integer, Observable<Integer>>() {
@Override
public Observable<Integer> call(Integer v) {
return Observable.range(v, 2);
}
});
}
@Benchmark
public void rangeFlatMapJust(Blackhole bh) {
rangeFlatMapJust.subscribe(new LatchedObserver<Object>(bh));
}
@Benchmark
public void rangeFlatMapRange(Blackhole bh) {
rangeFlatMapRange.subscribe(new LatchedObserver<Object>(bh));
}
}