Merge pull request #3634 from akarnokd/RedoPerf

1.x: redo performance checker

Author: akarnokd

src/perf/java/rx/operators/RedoPerf.java

@@ -0,0 +1,116 @@
+/**
+ * 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.Func1;
+import rx.internal.util.UtilityFunctions;
+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 .*RedoPerf.*"
+ * <p>
+ * gradlew benchmarks "-Pjmh=-f 1 -tu ns -bm avgt -wi 5 -i 5 -r 1 .*RedoPerf.*"
+ */
+@BenchmarkMode(Mode.Throughput)
+@OutputTimeUnit(TimeUnit.SECONDS)
+@State(Scope.Thread)
+public class RedoPerf {
+    @Param({"1,1", "1,1000", "1,1000000", "1000,1", "1000,1000", "1000000,1"})
+    public String params;
+    
+    public int len;
+    public int repeat;
+    
+    Observable<Integer> sourceRepeating;
+    
+    Observable<Integer> sourceRetrying;
+    
+    Observable<Integer> redoRepeating;
+    
+    Observable<Integer> redoRetrying;
+
+    Observable<Integer> baseline;
+    
+    @SuppressWarnings({ "rawtypes", "unchecked" })
+    @Setup
+    public void setup() {
+        String[] ps = params.split(",");
+        len = Integer.parseInt(ps[0]);
+        repeat = Integer.parseInt(ps[1]);        
+    
+        Integer[] values = new Integer[len];
+        Arrays.fill(values, 777);
+        
+        Observable<Integer> source = Observable.from(values);
+        
+        Observable<Integer> error = source.concatWith(Observable.<Integer>error(new RuntimeException()));
+        
+        Integer[] values2 = new Integer[len * repeat];
+        Arrays.fill(values2, 777);
+        
+        baseline = Observable.from(values2); 
+        
+        sourceRepeating = source.repeat(repeat);
+        
+        sourceRetrying = error.retry(repeat);
+        
+        redoRepeating = source.repeatWhen((Func1)UtilityFunctions.identity()).take(len * repeat);
+
+        redoRetrying = error.retryWhen((Func1)UtilityFunctions.identity()).take(len * repeat);
+    }
+    
+    @Benchmark
+    public void baseline(Blackhole bh) {
+        baseline.subscribe(new LatchedObserver<Integer>(bh));
+    }
+    
+    @Benchmark
+    public void repeatCounted(Blackhole bh) {
+        sourceRepeating.subscribe(new LatchedObserver<Integer>(bh));
+    }
+    
+    @Benchmark
+    public void retryCounted(Blackhole bh) {
+        sourceRetrying.subscribe(new LatchedObserver<Integer>(bh));
+    }
+    
+    @Benchmark
+    public void repeatWhen(Blackhole bh) {
+        redoRepeating.subscribe(new LatchedObserver<Integer>(bh));
+    }
+    
+    @Benchmark
+    public void retryWhen(Blackhole bh) {
+        redoRetrying.subscribe(new LatchedObserver<Integer>(bh));
+    }
+}