99 lines
3.2 KiB
Java
99 lines
3.2 KiB
Java
/*
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* Copyright (c) 2014, 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.openjdk.bench.vm.gc;
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import org.openjdk.jmh.annotations.Benchmark;
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import org.openjdk.jmh.annotations.BenchmarkMode;
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import org.openjdk.jmh.annotations.Mode;
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import org.openjdk.jmh.annotations.OutputTimeUnit;
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import org.openjdk.jmh.annotations.Scope;
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import org.openjdk.jmh.annotations.State;
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import org.openjdk.jmh.infra.Blackhole;
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import java.util.concurrent.TimeUnit;
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@BenchmarkMode(Mode.AverageTime)
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@OutputTimeUnit(TimeUnit.NANOSECONDS)
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@State(Scope.Thread)
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public class Alloc {
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public static final int LENGTH = 400;
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public static final int largeConstLen = 100;
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public static final int smallConstLen = 6;
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public int largeVariableLen = 100;
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public int smallVariableLen = 6;
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@Benchmark
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public void testLargeConstArray(Blackhole bh) throws Exception {
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int localArrlen = largeConstLen;
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for (int i = 0; i < LENGTH; i++) {
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Object[] tmp = new Object[localArrlen];
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bh.consume(tmp);
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}
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}
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@Benchmark
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public void testLargeVariableArray(Blackhole bh) throws Exception {
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int localArrlen = largeVariableLen;
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for (int i = 0; i < LENGTH; i++) {
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Object[] tmp = new Object[localArrlen];
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bh.consume(tmp);
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}
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}
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@Benchmark
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public void testSmallConstArray(Blackhole bh) throws Exception {
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int localArrlen = smallConstLen;
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for (int i = 0; i < LENGTH; i++) {
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Object[] tmp = new Object[localArrlen];
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bh.consume(tmp);
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}
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}
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@Benchmark
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public void testSmallObject(Blackhole bh) throws Exception {
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FortyBytes localDummy = null;
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for (int i = 0; i < LENGTH; i++) {
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FortyBytes tmp = new FortyBytes();
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tmp.next = localDummy;
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localDummy = tmp;
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bh.consume(tmp);
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}
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}
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@Benchmark
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public void testSmallVariableArray(Blackhole bh) throws Exception {
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int localArrlen = smallVariableLen;
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for (int i = 0; i < LENGTH; i++) {
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Object[] tmp = new Object[localArrlen];
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bh.consume(tmp);
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}
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}
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final class FortyBytes {
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Object next;
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int y, z, k, f, g, e, t;
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}
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}
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