src/perf/java/rx/operators/ZipPerf.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.Arrays;
import java.util.concurrent.TimeUnit;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.infra.Blackhole;
import rx.Observable;
import rx.functions.Func2;
import rx.jmh.LatchedObserver;
import rx.schedulers.Schedulers;
/**
* Benchmark the Zip operator.
* <p>
* gradlew benchmarks "-Pjmh=-f 1 -tu s -bm thrpt -wi 5 -i 5 -r 1 .*ZipPerf.*"
* <p>
* gradlew benchmarks "-Pjmh=-f 1 -tu ns -bm avgt -wi 5 -i 5 -r 1 .*ZipPerf.*"
*/
@BenchmarkMode(Mode.Throughput)
@OutputTimeUnit(TimeUnit.SECONDS)
@State(Scope.Thread)
public class ZipPerf {
@Param({"1", "1000", "1000000"})
public int firstLen;
@Param({"1", "1000", "1000000"})
public int secondLen;
Observable<Integer> baseline;
Observable<Integer> bothSync;
Observable<Integer> firstSync;
Observable<Integer> secondSync;
Observable<Integer> bothAsync;
boolean small;
@Setup
public void setup() {
Integer[] array1 = new Integer[firstLen];
Arrays.fill(array1, 777);
Integer[] array2 = new Integer[secondLen];
Arrays.fill(array2, 777);
baseline = Observable.from(firstLen < secondLen ? array2 : array1);
Observable<Integer> o1 = Observable.from(array1);
Observable<Integer> o2 = Observable.from(array2);
Func2<Integer, Integer, Integer> plus = new Func2<Integer, Integer, Integer>() {
@Override
public Integer call(Integer a, Integer b) {
return a + b;
}
};
bothSync = Observable.zip(o1, o2, plus);
firstSync = Observable.zip(o1, o2.subscribeOn(Schedulers.computation()), plus);
secondSync = Observable.zip(o1.subscribeOn(Schedulers.computation()), o2, plus);
bothAsync = Observable.zip(o1.subscribeOn(Schedulers.computation()), o2.subscribeOn(Schedulers.computation()), plus);
small = Math.min(firstLen, secondLen) < 100;
}
@Benchmark
public void baseline(Blackhole bh) {
baseline.subscribe(new LatchedObserver<Integer>(bh));
}
@Benchmark
public void syncSync(Blackhole bh) {
bothSync.subscribe(new LatchedObserver<Integer>(bh));
}
@Benchmark
public void syncAsync(Blackhole bh) throws Exception {
LatchedObserver<Integer> o = new LatchedObserver<Integer>(bh);
firstSync.subscribe(o);
if (small) {
while (o.latch.getCount() != 0) { }
} else {
o.latch.await();
}
}
@Benchmark
public void asyncSync(Blackhole bh) throws Exception {
LatchedObserver<Integer> o = new LatchedObserver<Integer>(bh);
secondSync.subscribe(o);
if (small) {
while (o.latch.getCount() != 0) { }
} else {
o.latch.await();
}
}
@Benchmark
public void asyncAsync(Blackhole bh) throws Exception {
LatchedObserver<Integer> o = new LatchedObserver<Integer>(bh);
bothAsync.subscribe(o);
if (small) {
while (o.latch.getCount() != 0) { }
} else {
o.latch.await();
}
}
}