| /* |
| * Copyright (C) 2012 The Guava Authors |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.google.common.hash; |
| |
| import com.google.caliper.BeforeExperiment; |
| import com.google.caliper.Benchmark; |
| import com.google.caliper.Param; |
| import java.security.MessageDigest; |
| |
| /** |
| * Benchmarks for comparing instance creation of {@link MessageDigest}s. |
| * |
| * @author Kurt Alfred Kluever |
| */ |
| public class MessageDigestCreationBenchmark { |
| |
| @Param({"MD5", "SHA-1", "SHA-256", "SHA-384", "SHA-512"}) |
| private String algorithm; |
| |
| private MessageDigest md; |
| |
| @BeforeExperiment |
| void setUp() throws Exception { |
| md = MessageDigest.getInstance(algorithm); |
| } |
| |
| @Benchmark |
| int getInstance(int reps) throws Exception { |
| int retValue = 0; |
| for (int i = 0; i < reps; i++) { |
| retValue ^= MessageDigest.getInstance(algorithm).getDigestLength(); |
| } |
| return retValue; |
| } |
| |
| @Benchmark |
| int clone(int reps) throws Exception { |
| int retValue = 0; |
| for (int i = 0; i < reps; i++) { |
| retValue ^= ((MessageDigest) md.clone()).getDigestLength(); |
| } |
| return retValue; |
| } |
| } |