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/*
* 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.Param;
import com.google.caliper.Runner;
import com.google.caliper.SimpleBenchmark;
import java.security.MessageDigest;
/**
* Benchmarks for comparing instance creation of {@link MessageDigest}s.
*
* @author Kurt Alfred Kluever
*/
public class MessageDigestCreationBenchmark extends SimpleBenchmark {
@Param({"MD5", "SHA-1", "SHA-256", "SHA-512"})
private String algorithm;
private MessageDigest md;
public void setUp() throws Exception {
md = MessageDigest.getInstance(algorithm);
}
public int timeGetInstance(int reps) throws Exception {
int retValue = 0;
for (int i = 0; i < reps; i++) {
retValue ^= MessageDigest.getInstance(algorithm).getDigestLength();
}
return retValue;
}
public int timeClone(int reps) throws Exception {
int retValue = 0;
for (int i = 0; i < reps; i++) {
retValue ^= ((MessageDigest) md.clone()).getDigestLength();
}
return retValue;
}
public static void main(String[] args) {
Runner.main(MessageDigestCreationBenchmark.class, args);
}
}
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