/*
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* Copyright (C) 2010 Google Inc.
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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 benchmarks.regression;
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import com.google.caliper.Param;
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import java.nio.ByteBuffer;
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import java.security.MessageDigest;
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public class MessageDigestBenchmark {
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private static final int DATA_SIZE = 8192;
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private static final byte[] DATA = new byte[DATA_SIZE];
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static {
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for (int i = 0; i < DATA_SIZE; i++) {
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DATA[i] = (byte)i;
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}
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}
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private static final int LARGE_DATA_SIZE = 256 * 1024;
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private static final byte[] LARGE_DATA = new byte[LARGE_DATA_SIZE];
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static {
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for (int i = 0; i < LARGE_DATA_SIZE; i++) {
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LARGE_DATA[i] = (byte)i;
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}
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}
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private static final ByteBuffer SMALL_BUFFER = ByteBuffer.wrap(DATA);
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private static final ByteBuffer SMALL_DIRECT_BUFFER = ByteBuffer.allocateDirect(DATA_SIZE);
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static {
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SMALL_DIRECT_BUFFER.put(DATA);
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SMALL_DIRECT_BUFFER.flip();
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}
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private static final ByteBuffer LARGE_BUFFER = ByteBuffer.wrap(LARGE_DATA);
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private static final ByteBuffer LARGE_DIRECT_BUFFER =
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ByteBuffer.allocateDirect(LARGE_DATA_SIZE);
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static {
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LARGE_DIRECT_BUFFER.put(LARGE_DATA);
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LARGE_DIRECT_BUFFER.flip();
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}
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@Param private Algorithm algorithm;
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public enum Algorithm { MD5, SHA1, SHA256, SHA384, SHA512 };
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@Param private Provider provider;
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public enum Provider { AndroidOpenSSL, BC };
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public void time(int reps) throws Exception {
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for (int i = 0; i < reps; ++i) {
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MessageDigest digest = MessageDigest.getInstance(algorithm.toString(),
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provider.toString());
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digest.update(DATA, 0, DATA_SIZE);
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digest.digest();
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}
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}
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public void timeLargeArray(int reps) throws Exception {
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for (int i = 0; i < reps; ++i) {
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MessageDigest digest = MessageDigest.getInstance(algorithm.toString(),
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provider.toString());
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digest.update(LARGE_DATA, 0, LARGE_DATA_SIZE);
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digest.digest();
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}
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}
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public void timeSmallChunkOfLargeArray(int reps) throws Exception {
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for (int i = 0; i < reps; ++i) {
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MessageDigest digest = MessageDigest.getInstance(algorithm.toString(),
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provider.toString());
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digest.update(LARGE_DATA, LARGE_DATA_SIZE / 2, DATA_SIZE);
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digest.digest();
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}
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}
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public void timeSmallByteBuffer(int reps) throws Exception {
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for (int i = 0; i < reps; ++i) {
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MessageDigest digest = MessageDigest.getInstance(algorithm.toString(),
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provider.toString());
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SMALL_BUFFER.position(0);
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SMALL_BUFFER.limit(SMALL_BUFFER.capacity());
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digest.update(SMALL_BUFFER);
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digest.digest();
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}
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}
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public void timeSmallDirectByteBuffer(int reps) throws Exception {
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for (int i = 0; i < reps; ++i) {
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MessageDigest digest = MessageDigest.getInstance(algorithm.toString(),
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provider.toString());
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SMALL_DIRECT_BUFFER.position(0);
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SMALL_DIRECT_BUFFER.limit(SMALL_DIRECT_BUFFER.capacity());
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digest.update(SMALL_DIRECT_BUFFER);
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digest.digest();
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}
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}
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public void timeLargeByteBuffer(int reps) throws Exception {
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for (int i = 0; i < reps; ++i) {
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MessageDigest digest = MessageDigest.getInstance(algorithm.toString(),
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provider.toString());
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LARGE_BUFFER.position(0);
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LARGE_BUFFER.limit(LARGE_BUFFER.capacity());
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digest.update(LARGE_BUFFER);
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digest.digest();
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}
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}
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public void timeLargeDirectByteBuffer(int reps) throws Exception {
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for (int i = 0; i < reps; ++i) {
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MessageDigest digest = MessageDigest.getInstance(algorithm.toString(),
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provider.toString());
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LARGE_DIRECT_BUFFER.position(0);
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LARGE_DIRECT_BUFFER.limit(LARGE_DIRECT_BUFFER.capacity());
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digest.update(LARGE_DIRECT_BUFFER);
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digest.digest();
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}
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}
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public void timeSmallChunkOfLargeByteBuffer(int reps) throws Exception {
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for (int i = 0; i < reps; ++i) {
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MessageDigest digest = MessageDigest.getInstance(algorithm.toString(),
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provider.toString());
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LARGE_BUFFER.position(LARGE_BUFFER.capacity() / 2);
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LARGE_BUFFER.limit(LARGE_BUFFER.position() + DATA_SIZE);
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digest.update(LARGE_BUFFER);
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digest.digest();
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}
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}
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public void timeSmallChunkOfLargeDirectByteBuffer(int reps) throws Exception {
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for (int i = 0; i < reps; ++i) {
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MessageDigest digest = MessageDigest.getInstance(algorithm.toString(),
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provider.toString());
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LARGE_DIRECT_BUFFER.position(LARGE_DIRECT_BUFFER.capacity() / 2);
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LARGE_DIRECT_BUFFER.limit(LARGE_DIRECT_BUFFER.position() + DATA_SIZE);
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digest.update(LARGE_DIRECT_BUFFER);
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digest.digest();
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}
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}
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}
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