92 lines
2.6 KiB
Java
92 lines
2.6 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.randomNonZeroBigInteger;
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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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import com.google.caliper.Param;
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import java.math.RoundingMode;
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/**
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* Benchmarks for the rounding methods of {@code LongMath}.
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*
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* @author Louis Wasserman
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*/
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public class LongMathRoundingBenchmark {
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@Param({"DOWN", "UP", "FLOOR", "CEILING", "HALF_EVEN", "HALF_UP", "HALF_DOWN"})
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RoundingMode mode;
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private static final long[] positive = new long[ARRAY_SIZE];
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private static final long[] nonzero = new long[ARRAY_SIZE];
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private static final long[] longs = new long[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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positive[i] = randomPositiveBigInteger(Long.SIZE - 2).longValue();
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nonzero[i] = randomNonZeroBigInteger(Long.SIZE - 2).longValue();
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longs[i] = RANDOM_SOURCE.nextLong();
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}
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}
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@Benchmark
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int log2(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 += LongMath.log2(positive[j], mode);
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}
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return tmp;
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}
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@Benchmark
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int log10(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 += LongMath.log10(positive[j], mode);
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}
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return tmp;
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}
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@Benchmark
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int sqrt(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 += LongMath.sqrt(positive[j], mode);
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}
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return tmp;
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}
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@Benchmark
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int divide(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 += LongMath.divide(longs[j], nonzero[j], mode);
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}
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return tmp;
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}
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}
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