1.x: PublishSubject perf (#4224)

* 1.x: PublishSubject perf

* Update year.

Author: akarnokd

src/perf/java/rx/subjects/PublishSubjectPerf.java

@@ -0,0 +1,62 @@
+/**
+ * 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.subjects;
+
+import java.util.concurrent.TimeUnit;
+
+import org.openjdk.jmh.annotations.*;
+import org.openjdk.jmh.infra.Blackhole;
+
+import rx.jmh.LatchedObserver;
+
+/**
+ * Benchmark PublishSubject.
+ * <p>
+ * gradlew benchmarks "-Pjmh=-f 1 -tu s -bm thrpt -wi 5 -i 5 -r 1 .*PublishSubjectPerf.*"
+ * <p>
+ * gradlew benchmarks "-Pjmh=-f 1 -tu ns -bm avgt -wi 5 -i 5 -r 1 .*PublishSubjectPerf.*"
+ */
+@BenchmarkMode(Mode.Throughput)
+@OutputTimeUnit(TimeUnit.SECONDS)
+@State(Scope.Thread)
+public class PublishSubjectPerf {
+    
+    @Param({ "1", "2", "4", "8"})
+    public int subscribers;
+    
+    @Param({ "1", "1000", "1000000"})
+    public int count;
+    
+    @Benchmark
+    public Object benchmark(Blackhole bh) {
+        PublishSubject<Integer> ps = PublishSubject.create();
+        
+        int s = subscribers;
+        for (int i = 0; i < s; i++) {
+            ps.subscribe(new LatchedObserver<Integer>(bh));
+        }
+        
+        int c = count;
+        for (int i = 0; i < c; i++) {
+            ps.onNext(777);
+        }
+        
+        ps.onCompleted();
+        
+        return ps;
+    }
+}