1 /*
   2  * Copyright (c) 2015, 2015, 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 package org.graalvm.compiler.virtual.bench;
  24 
  25 import org.openjdk.jmh.annotations.Benchmark;
  26 import org.openjdk.jmh.annotations.Scope;
  27 import org.openjdk.jmh.annotations.State;
  28 import org.openjdk.jmh.annotations.Warmup;
  29 
  30 import org.graalvm.compiler.microbenchmarks.graal.GraalBenchmark;
  31 
  32 public class PartialEscapeBench extends GraalBenchmark {
  33 
  34     private static class Thing {
  35         final int id;
  36         final String name;
  37 
  38         Thing(int id, String name) {
  39             this.id = id;
  40             this.name = name;
  41         }
  42     }
  43 
  44     @State(Scope.Thread)
  45     public static class ThingsCache {
  46 
  47         private Thing[] cache = new Thing[100];
  48 
  49         public Thing getOrAdd(Thing input) {
  50             if (cache[input.id] == null) {
  51                 cache[input.id] = input;
  52             }
  53             return cache[input.id];
  54         }
  55     }
  56 
  57     @Benchmark
  58     @Warmup(iterations = 30)
  59     public String benchPartialEscape(ThingsCache cache) {
  60         Thing thing = cache.getOrAdd(new Thing(42, "the answer!"));
  61         return thing.name;
  62     }
  63 }