86 lines
2.2 KiB
Java
86 lines
2.2 KiB
Java
/*
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* Copyright (c) 2024, Alibaba Group Co., Ltd. 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.compiler;
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import org.openjdk.jmh.annotations.Benchmark;
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import org.openjdk.jmh.annotations.*;
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import java.util.concurrent.TimeUnit;
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import org.openjdk.jmh.infra.Blackhole;
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/* test allocation speed of object with final field */
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@BenchmarkMode(Mode.Throughput)
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@OutputTimeUnit(TimeUnit.SECONDS)
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@State(Scope.Benchmark)
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@Warmup(iterations = 5, time = 3, timeUnit = TimeUnit.SECONDS)
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@Measurement(iterations = 3, time = 3, timeUnit = TimeUnit.SECONDS)
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@Fork(value = 3)
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public class FinalFieldInitialize {
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final static int LEN = 100_000;
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Object arr[] = null;
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@Setup
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public void setup(){
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arr = new Object[LEN];
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}
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@Benchmark
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public void testAlloc(Blackhole bh) {
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for (int i=0; i<LEN; i++) {
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arr[i] = new TObj();
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}
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bh.consume(arr);
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}
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@Benchmark
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public void testAllocWithFinal(Blackhole bh) {
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for (int i=0; i<LEN; i++) {
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arr[i] = new TObjWithFinal();
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}
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bh.consume(arr);
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}
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}
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class TObj {
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private int i;
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private long l;
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private boolean b;
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public TObj() {
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i = 10;
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l = 100L;
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b = true;
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}
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}
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class TObjWithFinal {
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private int i;
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private long l;
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private final boolean b;
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public TObjWithFinal() {
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i = 10;
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l = 100L;
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b = true;
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}
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}
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