231 lines
7.6 KiB
Java
231 lines
7.6 KiB
Java
/*
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* Copyright (c) 2014, 2024, 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.math;
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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.Fork;
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import org.openjdk.jmh.annotations.Measurement;
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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.annotations.Warmup;
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import org.openjdk.jmh.infra.Blackhole;
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import java.math.BigDecimal;
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import java.math.RoundingMode;
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import java.util.Random;
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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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@Warmup(iterations = 5, time = 1)
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@Measurement(iterations = 5, time = 1)
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@Fork(value = 3)
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public class BigDecimals {
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/** Make sure TEST_SIZE is used to size the arrays. We need this constant to parametrize the operations count. */
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private static final int TEST_SIZE = 100;
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/* dummy variables for intermediate results */
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public Object[] dummyArr;
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public String[] dummyStringArray;
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public int dummy;
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/* array to hold the created objects. */
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private BigDecimal[] bigDecimals;
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private String[] stringInputs;
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private double[] doubleInputs;
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private BigDecimal[] hugeArray, largeArray, smallArray;
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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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dummyArr = new Object[TEST_SIZE];
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bigDecimals = new BigDecimal[TEST_SIZE];
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stringInputs = new String[TEST_SIZE];
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doubleInputs = new double[TEST_SIZE];
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for (int i = 0; i < TEST_SIZE; i++) {
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double value = (double) (i + 1);
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switch (i % 4) {
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case 0:
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value = -value * 54345.0d;
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break;
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case 1:
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value = value * 5434543453454355e100;
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break;
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case 2:
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value = -value / 5434543453454355e100;
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break;
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case 3:
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break;
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}
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bigDecimals[i] = new BigDecimal(value);
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stringInputs[i] = "" + value;
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doubleInputs[i] = value;
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}
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/*
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* Huge numbers larger than MAX_LONG
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*/
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hugeArray = new BigDecimal[TEST_SIZE];
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/*
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* Large numbers less than MAX_LONG but larger than MAX_INT
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*/
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largeArray = new BigDecimal[TEST_SIZE];
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/*
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* Small number less than MAX_INT
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*/
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smallArray = new BigDecimal[TEST_SIZE];
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dummyStringArray = new String[TEST_SIZE];
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for (int i = 0; i < TEST_SIZE; i++) {
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int value = Math.abs(r.nextInt());
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hugeArray[i] = new BigDecimal("" + ((long) value + (long) Integer.MAX_VALUE)
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+ ((long) value + (long) Integer.MAX_VALUE) + ".55");
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largeArray[i] = new BigDecimal("" + ((long) value + (long) Integer.MAX_VALUE) + ".55");
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smallArray[i] = new BigDecimal("" + ((long) value / 1000) + ".55");
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}
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}
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/** Invokes the (String)-constructor of BigDecimal with various different values. */
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@Benchmark
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@OperationsPerInvocation(TEST_SIZE)
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public void testConstructorWithString(Blackhole bh) {
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for (String s : stringInputs) {
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bh.consume(new BigDecimal(s));
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}
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}
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/** Invokes the (double)-constructor of BigDecimal with various different values. */
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@Benchmark
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@OperationsPerInvocation(TEST_SIZE)
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public void testConstructorWithDouble(Blackhole bh) {
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for (double s : doubleInputs) {
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bh.consume(new BigDecimal(s));
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}
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}
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/**
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* Invokes the setScale method of BigDecimal with various different values.
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*/
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@Benchmark
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@OperationsPerInvocation(TEST_SIZE)
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public void testSetScale(Blackhole bh) {
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for (BigDecimal s : bigDecimals) {
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bh.consume(s.setScale(2, RoundingMode.HALF_UP));
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}
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}
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/** Invokes the setScale method of BigDecimal with various different values. */
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@Benchmark
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@OperationsPerInvocation(50 * TEST_SIZE)
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public void testSetScaleVarious(Blackhole bh) {
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for (int scale = 0; scale < 50; scale++) {
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for (BigDecimal s : bigDecimals) {
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bh.consume(s.setScale(scale, RoundingMode.HALF_UP));
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}
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}
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}
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/** Invokes the add method of BigDecimal with various different values. */
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@Benchmark
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@OperationsPerInvocation(TEST_SIZE)
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public void testAdd(Blackhole bh) {
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BigDecimal tmp = null;
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for (BigDecimal s : bigDecimals) {
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if (tmp == null) {
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tmp = s;
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continue;
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}
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tmp = tmp.add(s);
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}
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bh.consume(tmp);
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}
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/** Invokes the multiply method of BigDecimal with various different values. */
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@Benchmark
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@OperationsPerInvocation(TEST_SIZE)
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public void testMultiply(Blackhole bh) {
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BigDecimal tmp = null;
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for (BigDecimal s : bigDecimals) {
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if (tmp == null) {
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tmp = s;
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continue;
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}
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tmp = tmp.multiply(s);
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}
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bh.consume(tmp);
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}
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/** Test divide with huge/small numbers */
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@Benchmark
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@OperationsPerInvocation(TEST_SIZE * TEST_SIZE)
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public void testHugeSmallDivide(Blackhole bh) {
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for (BigDecimal s : hugeArray) {
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for (BigDecimal t : smallArray) {
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bh.consume(s.divide(t, RoundingMode.DOWN));
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}
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}
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}
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/** Test divide with large/small numbers */
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@Benchmark
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@OperationsPerInvocation(TEST_SIZE * TEST_SIZE)
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public void testLargeSmallDivide(Blackhole bh) {
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for (BigDecimal s : largeArray) {
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for (BigDecimal t : smallArray) {
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bh.consume(s.divide(t, RoundingMode.DOWN));
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}
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}
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}
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/** Test divide with huge/large numbers */
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@Benchmark
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@OperationsPerInvocation(TEST_SIZE * TEST_SIZE)
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public void testHugeLargeDivide(Blackhole bh) {
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for (BigDecimal s : hugeArray) {
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for (BigDecimal t : largeArray) {
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bh.consume(s.divide(t, RoundingMode.DOWN));
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}
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}
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}
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/** Invokes the compareTo method of BigDecimal with various different values. */
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@Benchmark
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@OperationsPerInvocation(TEST_SIZE - 1)
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public void testCompareTo(Blackhole bh) {
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BigDecimal c = bigDecimals[0];
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for (BigDecimal s : bigDecimals) {
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bh.consume(c.compareTo(s));
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}
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}
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}
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