276 lines
8.8 KiB
Java
276 lines
8.8 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.Param;
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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.BigInteger;
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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 BigIntegers {
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private BigInteger[] hugeArray, largeArray, smallArray, shiftArray;
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public String[] dummyStringArray;
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public Object[] dummyArr;
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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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int numbits = r.nextInt(16384);
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hugeArray = new BigInteger[TESTSIZE]; /*
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* Huge numbers larger than
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* MAX_LONG
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*/
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largeArray = new BigInteger[TESTSIZE]; /*
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* Large numbers less than
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* MAX_LONG but larger than
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* MAX_INT
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*/
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smallArray = new BigInteger[TESTSIZE]; /*
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* Small number less than
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* MAX_INT
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*/
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shiftArray = new BigInteger[TESTSIZE]; /*
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* Each array entry is atmost 16k bits
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* in size
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*/
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dummyStringArray = new String[TESTSIZE];
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dummyArr = new Object[TESTSIZE];
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for (int i = 0; i < TESTSIZE; i++) {
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int value = Math.abs(r.nextInt());
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hugeArray[i] = new BigInteger("" + ((long) value + (long) Integer.MAX_VALUE)
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+ ((long) value + (long) Integer.MAX_VALUE));
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largeArray[i] = new BigInteger("" + ((long) value + (long) Integer.MAX_VALUE));
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smallArray[i] = new BigInteger("" + ((long) value / 1000));
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shiftArray[i] = new BigInteger(numbits, r);
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}
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}
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/** Test BigInteger.toString() with huge numbers larger than MAX_LONG */
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@Benchmark
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@OperationsPerInvocation(TESTSIZE)
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public void testHugeToString(Blackhole bh) {
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for (BigInteger s : hugeArray) {
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bh.consume(s.toString());
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}
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}
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/** Test BigInteger.toString() with large numbers less than MAX_LONG but larger than MAX_INT */
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@Benchmark
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@OperationsPerInvocation(TESTSIZE)
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public void testLargeToString(Blackhole bh) {
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for (BigInteger s : largeArray) {
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bh.consume(s.toString());
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}
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}
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/** Test BigInteger.toString() with small numbers less than MAX_INT */
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@Benchmark
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@OperationsPerInvocation(TESTSIZE)
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public void testSmallToString(Blackhole bh) {
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for (BigInteger s : smallArray) {
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bh.consume(s.toString());
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}
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}
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/** Invokes the multiply method of BigInteger with various different values. */
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@Benchmark
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@OperationsPerInvocation(TESTSIZE)
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public void testMultiply(Blackhole bh) {
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BigInteger tmp = null;
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for (BigInteger s : hugeArray) {
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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(TESTSIZE * TESTSIZE)
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public void testHugeSmallDivide(Blackhole bh) {
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for (BigInteger s : hugeArray) {
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for (BigInteger t : smallArray) {
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bh.consume(s.divide(t));
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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(TESTSIZE * TESTSIZE)
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public void testLargeSmallDivide(Blackhole bh) {
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for (BigInteger s : largeArray) {
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for (BigInteger t : smallArray) {
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bh.consume(s.divide(t));
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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(TESTSIZE * TESTSIZE)
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public void testHugeLargeDivide(Blackhole bh) {
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for (BigInteger s : hugeArray) {
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for (BigInteger t : largeArray) {
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bh.consume(s.divide(t));
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}
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}
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}
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/** Invokes the multiply method of BigInteger with various different values. */
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@Benchmark
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@OperationsPerInvocation(TESTSIZE)
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public void testAdd(Blackhole bh) {
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BigInteger tmp = null;
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for (BigInteger s : hugeArray) {
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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 shiftLeft method of BigInteger with different values. */
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@Benchmark
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@OperationsPerInvocation(TESTSIZE)
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public void testLeftShift(Blackhole bh) {
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Random rand = new Random();
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int shift = rand.nextInt(30) + 1;
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BigInteger tmp = null;
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for (BigInteger s : shiftArray) {
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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.shiftLeft(shift);
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}
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bh.consume(tmp);
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}
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/** Invokes the shiftRight method of BigInteger with different values. */
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@Benchmark
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@OperationsPerInvocation(TESTSIZE)
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public void testRightShift(Blackhole bh) {
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Random rand = new Random();
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int shift = rand.nextInt(30) + 1;
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BigInteger tmp = null;
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for (BigInteger s : shiftArray) {
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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.shiftRight(shift);
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}
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bh.consume(tmp);
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}
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/** Invokes the gcd method of BigInteger with different values. */
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@Benchmark
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@OperationsPerInvocation(TESTSIZE)
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public void testGcd(Blackhole bh) {
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for (int i = 0; i < TESTSIZE; i++) {
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BigInteger i1 = shiftArray[TESTSIZE - i - 1];
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BigInteger i2 = shiftArray[i];
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bh.consume(i2.gcd(i1));
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}
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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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@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 static class SmallShifts {
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@Param({"32", "128", "256"})
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private int maxNumbits;
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/*
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* Small numbers, bits count in range [maxNumbits - 31, maxNumbits]
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*/
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BigInteger[] smallShiftArray = new BigInteger[TESTSIZE];
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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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for (int i = 0; i < TESTSIZE; i++) {
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int value = Math.abs(r.nextInt());
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smallShiftArray[i] = new BigInteger(Math.max(maxNumbits - value % 32, 0), r);
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}
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}
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/** Invokes the shiftLeft method of small BigInteger with different values. */
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@Benchmark
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@OperationsPerInvocation(TESTSIZE)
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public void testLeftShift(Blackhole bh) {
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Random rand = new Random();
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int shift = rand.nextInt(30) + 1;
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for (BigInteger s : smallShiftArray) {
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bh.consume(s.shiftLeft(shift));
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}
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}
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/** Invokes the shiftRight method of small BigInteger with different values. */
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@Benchmark
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@OperationsPerInvocation(TESTSIZE)
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public void testRightShift(Blackhole bh) {
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Random rand = new Random();
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int shift = rand.nextInt(30) + 1;
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for (BigInteger s : smallShiftArray) {
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bh.consume(s.shiftRight(shift));
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}
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}
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}
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}
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