112 lines
3.1 KiB
Java
112 lines
3.1 KiB
Java
//
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// Copyright (c) 2003, 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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//
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package org.openjdk.bench.java.lang;
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import java.util.Random;
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import java.util.concurrent.TimeUnit;
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import org.openjdk.jmh.annotations.*;
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import org.openjdk.jmh.infra.Blackhole;
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@OutputTimeUnit(TimeUnit.MILLISECONDS)
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@State(Scope.Thread)
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@BenchmarkMode(Mode.Throughput)
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@Warmup(iterations = 5, time = 1)
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@Measurement(iterations = 5, time = 1)
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@Fork(3)
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public class RotateBenchmark {
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@Param({"1024"})
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public int TESTSIZE;
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@Param({"20"})
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public int SHIFT;
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static final int CONSHIFT = 20;
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public long [] larr;
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public int [] iarr;
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public long [] lres;
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public int [] ires;
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@Setup(Level.Trial)
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public void BmSetup() {
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Random r = new Random(1024);
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larr = new long[TESTSIZE];
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iarr = new int[TESTSIZE];
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lres = new long[TESTSIZE];
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ires = new int[TESTSIZE];
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for (int i = 0; i < TESTSIZE; i++) {
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larr[i] = r.nextLong();
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}
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for (int i = 0; i < TESTSIZE; i++) {
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iarr[i] = r.nextInt();
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}
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}
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@Benchmark
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public void testRotateLeftI() {
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for (int i = 0; i < TESTSIZE; i++)
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ires[i] = Integer.rotateLeft(iarr[i], SHIFT);
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}
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@Benchmark
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public void testRotateRightI() {
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for (int i = 0; i < TESTSIZE; i++)
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ires[i] = Integer.rotateRight(iarr[i], SHIFT);
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}
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@Benchmark
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public void testRotateLeftL() {
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for (int i = 0; i < TESTSIZE; i++)
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lres[i] = Long.rotateLeft(larr[i], SHIFT);
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}
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@Benchmark
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public void testRotateRightL() {
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for (int i = 0; i < TESTSIZE; i++)
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lres[i] = Long.rotateRight(larr[i], SHIFT);
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}
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@Benchmark
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public void testRotateLeftConI() {
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for (int i = 0; i < TESTSIZE; i++)
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ires[i] = Integer.rotateLeft(iarr[i], CONSHIFT);
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}
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@Benchmark
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public void testRotateRightConI() {
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for (int i = 0; i < TESTSIZE; i++)
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ires[i] = Integer.rotateRight(iarr[i], CONSHIFT);
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}
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@Benchmark
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public void testRotateLeftConL() {
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for (int i = 0; i < TESTSIZE; i++)
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lres[i] = Long.rotateLeft(larr[i], CONSHIFT);
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}
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@Benchmark
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public void testRotateRightConL() {
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for (int i = 0; i < TESTSIZE; i++)
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lres[i] = Long.rotateRight(larr[i], CONSHIFT);
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}
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}
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