| /* |
| * Copyright (c) 2015, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package micro.benchmarks; |
| |
| import java.util.Arrays; |
| |
| import org.openjdk.jmh.annotations.Benchmark; |
| import org.openjdk.jmh.annotations.Level; |
| import org.openjdk.jmh.annotations.OperationsPerInvocation; |
| import org.openjdk.jmh.annotations.Scope; |
| import org.openjdk.jmh.annotations.Setup; |
| import org.openjdk.jmh.annotations.State; |
| import org.openjdk.jmh.annotations.TearDown; |
| |
| import org.graalvm.compiler.microbenchmarks.graal.GraalBenchmark; |
| |
| @State(Scope.Thread) |
| public class ArrayDuplicationBenchmark extends GraalBenchmark { |
| |
| /** How large should the test-arrays be. */ |
| private static final int TESTSIZE = 300; |
| |
| private Object[][] testObjectArray; |
| |
| private Object[] dummy; |
| |
| @Setup |
| public void setup() { |
| testObjectArray = new Object[TESTSIZE][]; |
| for (int i = 0; i < TESTSIZE; i++) { |
| testObjectArray[i] = new Object[20]; |
| } |
| } |
| |
| @Setup(Level.Iteration) |
| public void iterationSetup() { |
| dummy = new Object[TESTSIZE * 3]; |
| } |
| |
| @TearDown(Level.Iteration) |
| public void iterationTearDown() { |
| dummy = null; |
| } |
| |
| @Benchmark |
| @OperationsPerInvocation(TESTSIZE) |
| public Object[] normalArraycopy() { |
| int j = 0; |
| for (int i = 0; i < TESTSIZE; i++) { |
| dummy[j++] = normalArraycopy(testObjectArray[i]); |
| } |
| return dummy; |
| } |
| |
| public Object[] normalArraycopy(Object[] cache) { |
| Object[] result = new Object[cache.length]; |
| System.arraycopy(cache, 0, result, 0, result.length); |
| return result; |
| } |
| |
| @Benchmark |
| @OperationsPerInvocation(TESTSIZE) |
| public Object[] arraysCopyOf() { |
| int j = 0; |
| for (int i = 0; i < TESTSIZE; i++) { |
| dummy[j++] = arraysCopyOf(testObjectArray[i]); |
| } |
| return dummy; |
| } |
| |
| public Object[] arraysCopyOf(Object[] cache) { |
| return Arrays.copyOf(cache, cache.length); |
| } |
| |
| @Benchmark |
| @OperationsPerInvocation(TESTSIZE) |
| public Object[] cloneObjectArray() { |
| int j = 0; |
| for (int i = 0; i < TESTSIZE; i++) { |
| dummy[j++] = arraysClone(testObjectArray[i]); |
| } |
| return dummy; |
| } |
| |
| @SuppressWarnings("cast") |
| public Object[] arraysClone(Object[] cache) { |
| return (Object[]) cache.clone(); |
| } |
| |
| } |