diff options
Diffstat (limited to 'guava-tests/benchmark/com/google/common/hash/HashFunctionBenchmark.java')
-rw-r--r-- | guava-tests/benchmark/com/google/common/hash/HashFunctionBenchmark.java | 87 |
1 files changed, 0 insertions, 87 deletions
diff --git a/guava-tests/benchmark/com/google/common/hash/HashFunctionBenchmark.java b/guava-tests/benchmark/com/google/common/hash/HashFunctionBenchmark.java deleted file mode 100644 index 92a8cf3..0000000 --- a/guava-tests/benchmark/com/google/common/hash/HashFunctionBenchmark.java +++ /dev/null @@ -1,87 +0,0 @@ -/* - * 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.util.Random; - -/** - * Benchmarks for comparing the various {@link HashFunction functions} that we provide. - * - * <p>Parameters for the benchmark are: - * <ul> - * <li>size: The length of the byte array to hash. - * </ul> - * - * @author Kurt Alfred Kluever - */ -public class HashFunctionBenchmark extends SimpleBenchmark { - - // Use a constant seed for all of the benchmarks to ensure apples to apples comparisons. - private static final int RANDOM_SEED = new Random().nextInt(); - - @Param({"10", "1000", "100000", "1000000"}) - private int size; - - private byte[] testBytes; - - @Override public void setUp() { - testBytes = new byte[size]; - new Random(RANDOM_SEED).nextBytes(testBytes); - } - - public int timeMurmur32HashFunction(int reps) { - return runHashFunction(reps, Hashing.murmur3_32()); - } - - public int timeMurmur128HashFunction(int reps) { - return runHashFunction(reps, Hashing.murmur3_128()); - } - - public int timeMd5HashFunction(int reps) { - return runHashFunction(reps, Hashing.md5()); - } - - public int timeSha1HashFunction(int reps) { - return runHashFunction(reps, Hashing.sha1()); - } - - public int timeSha256HashFunction(int reps) { - return runHashFunction(reps, Hashing.sha256()); - } - - public int timeSha512HashFunction(int reps) { - return runHashFunction(reps, Hashing.sha512()); - } - - private int runHashFunction(int reps, HashFunction hashFunction) { - int result = 37; - for (int i = 0; i < reps; i++) { - result ^= hashFunction.hashBytes(testBytes).asInt(); - } - return result; - } - - public static void main(String[] args) { - Runner.main(HashFunctionBenchmark.class, args); - } -} |