17dd252788645e940eada959bdde927426e2531c9Paul Duffin/* 27dd252788645e940eada959bdde927426e2531c9Paul Duffin * Copyright (C) 2012 The Guava Authors 37dd252788645e940eada959bdde927426e2531c9Paul Duffin * 47dd252788645e940eada959bdde927426e2531c9Paul Duffin * Licensed under the Apache License, Version 2.0 (the "License"); 57dd252788645e940eada959bdde927426e2531c9Paul Duffin * you may not use this file except in compliance with the License. 67dd252788645e940eada959bdde927426e2531c9Paul Duffin * You may obtain a copy of the License at 77dd252788645e940eada959bdde927426e2531c9Paul Duffin * 87dd252788645e940eada959bdde927426e2531c9Paul Duffin * http://www.apache.org/licenses/LICENSE-2.0 97dd252788645e940eada959bdde927426e2531c9Paul Duffin * 107dd252788645e940eada959bdde927426e2531c9Paul Duffin * Unless required by applicable law or agreed to in writing, software 117dd252788645e940eada959bdde927426e2531c9Paul Duffin * distributed under the License is distributed on an "AS IS" BASIS, 127dd252788645e940eada959bdde927426e2531c9Paul Duffin * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 137dd252788645e940eada959bdde927426e2531c9Paul Duffin * See the License for the specific language governing permissions and 147dd252788645e940eada959bdde927426e2531c9Paul Duffin * limitations under the License. 157dd252788645e940eada959bdde927426e2531c9Paul Duffin */ 167dd252788645e940eada959bdde927426e2531c9Paul Duffin 177dd252788645e940eada959bdde927426e2531c9Paul Duffinpackage com.google.common.hash; 187dd252788645e940eada959bdde927426e2531c9Paul Duffin 190888a09821a98ac0680fad765217302858e70fa4Paul Duffinimport com.google.caliper.BeforeExperiment; 200888a09821a98ac0680fad765217302858e70fa4Paul Duffinimport com.google.caliper.Benchmark; 217dd252788645e940eada959bdde927426e2531c9Paul Duffinimport com.google.caliper.Param; 227dd252788645e940eada959bdde927426e2531c9Paul Duffin 237dd252788645e940eada959bdde927426e2531c9Paul Duffinimport java.security.MessageDigest; 247dd252788645e940eada959bdde927426e2531c9Paul Duffin 257dd252788645e940eada959bdde927426e2531c9Paul Duffin/** 267dd252788645e940eada959bdde927426e2531c9Paul Duffin * Benchmarks for comparing instance creation of {@link MessageDigest}s. 277dd252788645e940eada959bdde927426e2531c9Paul Duffin * 287dd252788645e940eada959bdde927426e2531c9Paul Duffin * @author Kurt Alfred Kluever 297dd252788645e940eada959bdde927426e2531c9Paul Duffin */ 300888a09821a98ac0680fad765217302858e70fa4Paul Duffinpublic class MessageDigestCreationBenchmark { 317dd252788645e940eada959bdde927426e2531c9Paul Duffin 327dd252788645e940eada959bdde927426e2531c9Paul Duffin @Param({"MD5", "SHA-1", "SHA-256", "SHA-512"}) 337dd252788645e940eada959bdde927426e2531c9Paul Duffin private String algorithm; 347dd252788645e940eada959bdde927426e2531c9Paul Duffin 357dd252788645e940eada959bdde927426e2531c9Paul Duffin private MessageDigest md; 367dd252788645e940eada959bdde927426e2531c9Paul Duffin 370888a09821a98ac0680fad765217302858e70fa4Paul Duffin @BeforeExperiment void setUp() throws Exception { 387dd252788645e940eada959bdde927426e2531c9Paul Duffin md = MessageDigest.getInstance(algorithm); 397dd252788645e940eada959bdde927426e2531c9Paul Duffin } 407dd252788645e940eada959bdde927426e2531c9Paul Duffin 410888a09821a98ac0680fad765217302858e70fa4Paul Duffin @Benchmark int getInstance(int reps) throws Exception { 427dd252788645e940eada959bdde927426e2531c9Paul Duffin int retValue = 0; 437dd252788645e940eada959bdde927426e2531c9Paul Duffin for (int i = 0; i < reps; i++) { 447dd252788645e940eada959bdde927426e2531c9Paul Duffin retValue ^= MessageDigest.getInstance(algorithm).getDigestLength(); 457dd252788645e940eada959bdde927426e2531c9Paul Duffin } 467dd252788645e940eada959bdde927426e2531c9Paul Duffin return retValue; 477dd252788645e940eada959bdde927426e2531c9Paul Duffin } 487dd252788645e940eada959bdde927426e2531c9Paul Duffin 490888a09821a98ac0680fad765217302858e70fa4Paul Duffin @Benchmark int clone(int reps) throws Exception { 507dd252788645e940eada959bdde927426e2531c9Paul Duffin int retValue = 0; 517dd252788645e940eada959bdde927426e2531c9Paul Duffin for (int i = 0; i < reps; i++) { 527dd252788645e940eada959bdde927426e2531c9Paul Duffin retValue ^= ((MessageDigest) md.clone()).getDigestLength(); 537dd252788645e940eada959bdde927426e2531c9Paul Duffin } 547dd252788645e940eada959bdde927426e2531c9Paul Duffin return retValue; 557dd252788645e940eada959bdde927426e2531c9Paul Duffin } 567dd252788645e940eada959bdde927426e2531c9Paul Duffin} 57