1 /* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.openjdk.bench.java.lang; 24 25 import org.openjdk.jmh.annotations.Benchmark; 26 import org.openjdk.jmh.annotations.BenchmarkMode; 27 import org.openjdk.jmh.annotations.Mode; 28 import org.openjdk.jmh.annotations.OperationsPerInvocation; 29 import org.openjdk.jmh.annotations.OutputTimeUnit; 30 import org.openjdk.jmh.annotations.Scope; 31 import org.openjdk.jmh.annotations.Setup; 32 import org.openjdk.jmh.annotations.State; 33 import org.openjdk.jmh.infra.Blackhole; 34 35 import java.util.Random; 36 import java.util.concurrent.TimeUnit; 37 38 /** 39 * Tests for sun.misc.FloatingDecimal. Performs floating point number to String conversions. 40 */ 41 @BenchmarkMode(Mode.AverageTime) 42 @OutputTimeUnit(TimeUnit.NANOSECONDS) 43 @State(Scope.Thread) 44 public class FloatingDecimal { 45 46 private double[] randomArray, twoDecimalsArray, integerArray; 47 private static final int TESTSIZE = 1000; 48 49 @Setup 50 public void setup() { 51 Random r = new Random(1123); 52 randomArray = new double[TESTSIZE]; 53 twoDecimalsArray = new double[TESTSIZE]; 54 integerArray = new double[TESTSIZE]; 55 for (int i = 0; i < TESTSIZE; i++) { 56 randomArray[i] = r.nextDouble() * 10000.0D; 57 twoDecimalsArray[i] = ((double) (10000 - r.nextInt(20000))) / 100; 58 integerArray[i] = (double) (100 - r.nextInt(200)); 59 } 60 } 61 62 /** Tests Double.toString on double values generated from Random.nextDouble() */ 63 @Benchmark 64 @OperationsPerInvocation(TESTSIZE) 65 public void randomDoubleToString(Blackhole bh) { 66 for (double d : randomArray) { 67 bh.consume(Double.toString(d)); 68 } 69 } 70 71 /** Tests Double.toString on double values that are integers between -100 and 100. */ 72 @Benchmark 73 @OperationsPerInvocation(TESTSIZE) 74 public void integerDoubleToString(Blackhole bh) { 75 for (double d : integerArray) { 76 bh.consume(Double.toString(d)); 77 } 78 } 79 80 /** Tests Double.toString on double values that are between -100 and 100 and have two decimal digits. */ 81 @Benchmark 82 @OperationsPerInvocation(TESTSIZE) 83 public void twoDecimalsDoubleToString(Blackhole bh) { 84 for (double d : twoDecimalsArray) { 85 bh.consume(Double.toString(d)); 86 } 87 } 88 89 }