7a30c97753
8061282: Migrate jmh-jdk-microbenchmarks into the JDK Co-authored-by: Magnus Ihse Bursie <magnus.ihse.bursie@oracle.com> Co-authored-by: Erik Joelsson <erik.joelsson@oracle.com> Co-authored-by: Staffan Friberg <sfriberg@kth.se> Reviewed-by: ecaspole, mchung, erikj, ihse
90 lines
3.2 KiB
Java
90 lines
3.2 KiB
Java
/*
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* Copyright (c) 2014 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.java.lang;
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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.OperationsPerInvocation;
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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.Setup;
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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.Random;
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import java.util.concurrent.TimeUnit;
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/**
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* Tests for sun.misc.FloatingDecimal. Performs floating point number to String conversions.
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*/
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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 FloatingDecimal {
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private double[] randomArray, twoDecimalsArray, integerArray;
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private static final int TESTSIZE = 1000;
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@Setup
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public void setup() {
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Random r = new Random(1123);
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randomArray = new double[TESTSIZE];
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twoDecimalsArray = new double[TESTSIZE];
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integerArray = new double[TESTSIZE];
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for (int i = 0; i < TESTSIZE; i++) {
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randomArray[i] = r.nextDouble() * 10000.0D;
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twoDecimalsArray[i] = ((double) (10000 - r.nextInt(20000))) / 100;
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integerArray[i] = (double) (100 - r.nextInt(200));
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}
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}
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/** Tests Double.toString on double values generated from Random.nextDouble() */
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@Benchmark
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@OperationsPerInvocation(TESTSIZE)
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public void randomDoubleToString(Blackhole bh) {
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for (double d : randomArray) {
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bh.consume(Double.toString(d));
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}
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}
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/** Tests Double.toString on double values that are integers between -100 and 100. */
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@Benchmark
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@OperationsPerInvocation(TESTSIZE)
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public void integerDoubleToString(Blackhole bh) {
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for (double d : integerArray) {
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bh.consume(Double.toString(d));
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}
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}
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/** Tests Double.toString on double values that are between -100 and 100 and have two decimal digits. */
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@Benchmark
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@OperationsPerInvocation(TESTSIZE)
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public void twoDecimalsDoubleToString(Blackhole bh) {
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for (double d : twoDecimalsArray) {
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bh.consume(Double.toString(d));
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}
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}
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}
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