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-rw-r--r--guava-tests/benchmark/com/google/common/hash/MessageDigestAlgorithmBenchmark.java111
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diff --git a/guava-tests/benchmark/com/google/common/hash/MessageDigestAlgorithmBenchmark.java b/guava-tests/benchmark/com/google/common/hash/MessageDigestAlgorithmBenchmark.java
deleted file mode 100644
index bef6e63..0000000
--- a/guava-tests/benchmark/com/google/common/hash/MessageDigestAlgorithmBenchmark.java
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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 com.google.common.hash.HashFunction;
-import com.google.common.hash.Hashing;
-
-import java.security.MessageDigest;
-import java.security.NoSuchAlgorithmException;
-
-import java.util.Random;
-
-/**
- * Benchmarks for comparing {@link MessageDigest}s and {@link HashFunction}s that wrap
- * {@link MessageDigest}s.
- *
- * <p>Parameters for the benchmark are:
- * <ul>
- * <li>size: The length of the byte array to hash.
- * <li>algorithm: the algorithm to hash with (e.g. MD5, SHA1, etc.).
- * <li>hashMethod: how to hash the data (using the Hashing API or the MessageDigest API).
- * </ul>
- *
- * @author Kurt Alfred Kluever
- */
-public class MessageDigestAlgorithmBenchmark extends SimpleBenchmark {
- @Param({"10", "1000", "100000", "1000000"}) int size;
- @Param Algorithm algorithm;
- @Param HashMethod hashMethod;
-
- private enum HashMethod {
- MESSAGE_DIGEST_API() {
- @Override public byte[] hash(Algorithm algorithm, byte[] input) {
- MessageDigest md = algorithm.getMessageDigest();
- md.update(input);
- return md.digest();
- }
- },
- HASH_FUNCTION_API() {
- @Override public byte[] hash(Algorithm algorithm, byte[] input) {
- return algorithm.getHashFunction().hashBytes(input).asBytes();
- }
- };
- public abstract byte[] hash(Algorithm algorithm, byte[] input);
- }
-
- private enum Algorithm {
- MD5("MD5", Hashing.md5()),
- SHA_1("SHA-1", Hashing.sha1()),
- SHA_256("SHA-256", Hashing.sha256()),
- SHA_512("SHA-512", Hashing.sha512());
-
- private final String algorithmName;
- private final HashFunction hashFn;
- Algorithm(String algorithmName, HashFunction hashFn) {
- this.algorithmName = algorithmName;
- this.hashFn = hashFn;
- }
- public MessageDigest getMessageDigest() {
- try {
- return MessageDigest.getInstance(algorithmName);
- } catch (NoSuchAlgorithmException e) {
- throw new AssertionError(e);
- }
- }
- public HashFunction getHashFunction() {
- return hashFn;
- }
- }
-
- // Use a constant seed for all of the benchmarks to ensure apples to apples comparisons.
- private static final int RANDOM_SEED = new Random().nextInt();
-
- private byte[] testBytes;
-
- @Override public void setUp() {
- testBytes = new byte[size];
- new Random(RANDOM_SEED).nextBytes(testBytes);
- }
-
- public byte timeHashing(int reps) {
- byte result = 0x01;
- HashMethod hashMethod = this.hashMethod;
- Algorithm algorithm = this.algorithm;
- for (int i = 0; i < reps; i++) {
- result ^= hashMethod.hash(algorithm, testBytes)[0];
- }
- return result;
- }
-
- public static void main(String[] args) {
- Runner.main(MessageDigestAlgorithmBenchmark.class, args);
- }
-}