Merge pull request #1030 from daschl/subj-bench

Benchmarking: Add JMH benchmark for ReplaySubject.

Author: benjchristensen

rxjava-core/src/perf/java/rx/jmh/Baseline.java

@@ -1,3 +1,18 @@
+/**
+ * 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.jmh;
 
 import org.openjdk.jmh.annotations.GenerateMicroBenchmark;

rxjava-core/src/perf/java/rx/operators/OperatorMapPerf.java

@@ -1,3 +1,18 @@
+/**
+ * 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.CountDownLatch;

rxjava-core/src/perf/java/rx/operators/OperatorSerializePerf.java

@@ -1,3 +1,18 @@
+/**
+ * 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.CountDownLatch;

rxjava-core/src/perf/java/rx/subjects/ReplaySubjectPerf.java

@@ -0,0 +1,98 @@
+/**
+ * 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.subjects;
+
+import org.openjdk.jmh.annotations.GenerateMicroBenchmark;
+import org.openjdk.jmh.annotations.Param;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.logic.BlackHole;
+import rx.Observer;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.atomic.AtomicLong;
+
+/**
+ * Benchmarks the {@link ReplaySubject}.
+ */
+public class ReplaySubjectPerf {
+
+    @State(Scope.Thread)
+    public static class Input {
+        @Param({ "1", "512", "1024", "1048576" })
+        public int nextRuns;
+    }
+
+    @GenerateMicroBenchmark
+    public void subscribeBeforeEvents(final Input input, final BlackHole bh) throws Exception {
+        ReplaySubject<Object> subject = ReplaySubject.create();
+        final CountDownLatch latch = new CountDownLatch(1);
+        final AtomicLong sum = new AtomicLong();
+
+        subject.subscribe(new Observer<Object>() {
+            @Override
+            public void onCompleted() {
+                latch.countDown();
+            }
+
+            @Override
+            public void onError(Throwable e) {
+            }
+
+            @Override
+            public void onNext(Object o) {
+                sum.incrementAndGet();
+            }
+        });
+        for (int i = 0; i < input.nextRuns; i++) {
+            subject.onNext("Response");
+        }
+        subject.onCompleted();
+        latch.await();
+        bh.consume(sum);
+    }
+
+    @GenerateMicroBenchmark
+    public void subscribeAfterEvents(final Input input, final BlackHole bh) throws Exception {
+        ReplaySubject<Object> subject = ReplaySubject.create();
+        final CountDownLatch latch = new CountDownLatch(1);
+        final AtomicLong sum = new AtomicLong();
+
+        for (int i = 0; i < input.nextRuns; i++) {
+            subject.onNext("Response");
+        }
+        subject.onCompleted();
+
+        subject.subscribe(new Observer<Object>() {
+            @Override
+            public void onCompleted() {
+                latch.countDown();
+            }
+
+            @Override
+            public void onError(Throwable e) {
+            }
+
+            @Override
+            public void onNext(Object o) {
+                sum.incrementAndGet();
+            }
+        });
+        latch.await();
+        bh.consume(sum);
+    }
+
+}