116 lines
3.2 KiB
Java
116 lines
3.2 KiB
Java
/*
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* Copyright (C) 2011 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.common.math;
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import static com.google.common.math.MathBenchmarking.ARRAY_MASK;
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import static com.google.common.math.MathBenchmarking.ARRAY_SIZE;
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import static com.google.common.math.MathBenchmarking.RANDOM_SOURCE;
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import static com.google.common.math.MathBenchmarking.randomExponent;
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import static com.google.common.math.MathBenchmarking.randomNonNegativeBigInteger;
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import static com.google.common.math.MathBenchmarking.randomPositiveBigInteger;
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import com.google.caliper.BeforeExperiment;
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import com.google.caliper.Benchmark;
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/**
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* Benchmarks for the non-rounding methods of {@code IntMath}.
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*
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* @author Louis Wasserman
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*/
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public class IntMathBenchmark {
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private static int[] exponent = new int[ARRAY_SIZE];
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private static int[] factorial = new int[ARRAY_SIZE];
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private static int[] binomial = new int[ARRAY_SIZE];
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private static final int[] positive = new int[ARRAY_SIZE];
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private static final int[] nonnegative = new int[ARRAY_SIZE];
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private static final int[] ints = new int[ARRAY_SIZE];
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@BeforeExperiment
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void setUp() {
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for (int i = 0; i < ARRAY_SIZE; i++) {
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exponent[i] = randomExponent();
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factorial[i] = RANDOM_SOURCE.nextInt(50);
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binomial[i] = RANDOM_SOURCE.nextInt(factorial[i] + 1);
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positive[i] = randomPositiveBigInteger(Integer.SIZE - 1).intValue();
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nonnegative[i] = randomNonNegativeBigInteger(Integer.SIZE - 1).intValue();
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ints[i] = RANDOM_SOURCE.nextInt();
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}
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}
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@Benchmark
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int pow(int reps) {
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int tmp = 0;
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for (int i = 0; i < reps; i++) {
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int j = i & ARRAY_MASK;
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tmp += IntMath.pow(positive[j], exponent[j]);
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}
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return tmp;
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}
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@Benchmark
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int mod(int reps) {
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int tmp = 0;
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for (int i = 0; i < reps; i++) {
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int j = i & ARRAY_MASK;
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tmp += IntMath.mod(ints[j], positive[j]);
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}
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return tmp;
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}
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@Benchmark
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int gCD(int reps) {
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int tmp = 0;
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for (int i = 0; i < reps; i++) {
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int j = i & ARRAY_MASK;
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tmp += IntMath.gcd(nonnegative[j], positive[j]);
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}
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return tmp;
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}
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@Benchmark
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int factorial(int reps) {
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int tmp = 0;
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for (int i = 0; i < reps; i++) {
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int j = i & ARRAY_MASK;
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tmp += IntMath.factorial(factorial[j]);
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}
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return tmp;
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}
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@Benchmark
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int binomial(int reps) {
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int tmp = 0;
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for (int i = 0; i < reps; i++) {
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int j = i & ARRAY_MASK;
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tmp += IntMath.binomial(factorial[j], binomial[j]);
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}
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return tmp;
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}
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@Benchmark
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int isPrime(int reps) {
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int tmp = 0;
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for (int i = 0; i < reps; i++) {
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int j = i & ARRAY_MASK;
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if (IntMath.isPrime(positive[j])) {
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tmp++;
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}
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}
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return tmp;
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}
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}
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