1 /* 2 * Copyright (C) 2012 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.common.hash; 18 19 import com.google.caliper.BeforeExperiment; 20 import com.google.caliper.Benchmark; 21 import com.google.caliper.Param; 22 23 import java.security.MessageDigest; 24 25 /** 26 * Benchmarks for comparing instance creation of {@link MessageDigest}s. 27 * 28 * @author Kurt Alfred Kluever 29 */ 30 public class MessageDigestCreationBenchmark { 31 32 @Param({"MD5", "SHA-1", "SHA-256", "SHA-512"}) 33 private String algorithm; 34 35 private MessageDigest md; 36 setUp()37 @BeforeExperiment void setUp() throws Exception { 38 md = MessageDigest.getInstance(algorithm); 39 } 40 getInstance(int reps)41 @Benchmark int getInstance(int reps) throws Exception { 42 int retValue = 0; 43 for (int i = 0; i < reps; i++) { 44 retValue ^= MessageDigest.getInstance(algorithm).getDigestLength(); 45 } 46 return retValue; 47 } 48 clone(int reps)49 @Benchmark int clone(int reps) throws Exception { 50 int retValue = 0; 51 for (int i = 0; i < reps; i++) { 52 retValue ^= ((MessageDigest) md.clone()).getDigestLength(); 53 } 54 return retValue; 55 } 56 } 57