ARTEMIS-3049 append only chunk list benchmark

tests/performance-jmh/src/main/java/org/apache/activemq/artemis/tests/performance/jmh/ConcurrentAppendOnlyChunkListLookupBenchmark.java

@@ -0,0 +1,80 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.activemq.artemis.tests.performance.jmh;
+
+import org.apache.activemq.artemis.utils.collections.ConcurrentAppendOnlyChunkedList;
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.Fork;
+import org.openjdk.jmh.annotations.Measurement;
+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.annotations.Warmup;
+
+@State(Scope.Benchmark)
+@Fork(2)
+@Warmup(iterations = 5, time = 1)
+@Measurement(iterations = 8, time = 1)
+public class ConcurrentAppendOnlyChunkListLookupBenchmark {
+
+   private static final Integer MSG = 0;
+
+   @Param({"1000", "10000"})
+   int size;
+
+   @Param({"32"})
+   int chunkSize;
+
+   private ConcurrentAppendOnlyChunkedList<Integer> list;
+
+   @Setup
+   public void init() {
+      list = new ConcurrentAppendOnlyChunkedList<>(chunkSize);
+      for (int i = 0; i < size; i++) {
+         list.add(MSG);
+      }
+   }
+
+   @State(Scope.Thread)
+   public static class Index {
+
+      private int size;
+      private int index;
+
+      @Setup
+      public void init(ConcurrentAppendOnlyChunkListLookupBenchmark benchmark) {
+         index = 0;
+         size = benchmark.size;
+      }
+
+      public int next() {
+         index++;
+         if (index == size) {
+            index = 0;
+            return 0;
+         }
+         return index;
+      }
+   }
+
+   @Benchmark
+   public Integer lookup(Index index) {
+      return list.get(index.next());
+   }
+
+}