1 /*
   2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 
  25 package micro.benchmarks;
  26 
  27 import org.openjdk.jmh.annotations.Benchmark;
  28 import org.openjdk.jmh.annotations.Param;
  29 import org.openjdk.jmh.annotations.Scope;
  30 import org.openjdk.jmh.annotations.State;
  31 import org.openjdk.jmh.annotations.Threads;
  32 import org.openjdk.jmh.annotations.Warmup;
  33 
  34 /**
  35  * Benchmarks cost of ArrayList.
  36  */
  37 public class ArrayAllocationBenchmark extends BenchmarkBase {
  38 
  39     @State(Scope.Benchmark)
  40     public static class ThreadState {
  41         @Param({"128", "256", "512", "1024", "2048", "4096", "8192", "16384", "32768", "65536", "131072"}) int size;
  42         byte[] result;
  43     }
  44 
  45     @Benchmark
  46     @Threads(8)
  47     @Warmup(iterations = 10)
  48     public void arrayAllocate(ThreadState state) {
  49         state.result = new byte[state.size];
  50     }
  51 }