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WordFrequencyBenchmark.java
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WordFrequencyBenchmark.java
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/*
* JVM Performance Benchmarks
*
* Copyright (C) 2019 - 2024 Ionut Balosin
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.ionutbalosin.jvm.performance.benchmarks.miscellaneous.wordfrequency;
import com.ionutbalosin.jvm.performance.benchmarks.miscellaneous.wordfrequency.functional.ParallelStreamWordFrequency;
import com.ionutbalosin.jvm.performance.benchmarks.miscellaneous.wordfrequency.functional.PatternStreamWordFrequency;
import com.ionutbalosin.jvm.performance.benchmarks.miscellaneous.wordfrequency.iterative.IterativeWordFrequency;
import java.io.IOException;
import java.net.URISyntaxException;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
/*
* Computes the word frequencies/occurrences from a text file.
* The benchmark uses a few alternative approaches:
* - iterative
* - parallel streams
* - pattern streams
*
*/
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@Warmup(iterations = 5, time = 10, timeUnit = TimeUnit.SECONDS)
@Measurement(iterations = 5, time = 10, timeUnit = TimeUnit.SECONDS)
@Fork(value = 5)
@State(Scope.Benchmark)
public class WordFrequencyBenchmark {
// $ java -jar */*/benchmarks.jar ".*WordFrequencyBenchmark.*"
private final String CURRENT_DIR = System.getProperty("user.dir", ".");
private final String FILE_NAME =
CURRENT_DIR + "/benchmarks/src/main/resources/word_frequency.txt";
@Setup()
public void setup() throws IOException, URISyntaxException {
// make sure the results are equivalent before any further benchmarking
sanityCheck(
IterativeWordFrequency.frequencies(FILE_NAME),
ParallelStreamWordFrequency.frequencies(FILE_NAME),
PatternStreamWordFrequency.frequencies(FILE_NAME));
}
@Benchmark
public Map<String, Long> iterative() throws IOException {
return IterativeWordFrequency.frequencies(FILE_NAME);
}
@Benchmark
public Map<String, Long> parallel_stream() throws IOException {
return ParallelStreamWordFrequency.frequencies(FILE_NAME);
}
@Benchmark
public Map<String, Long> pattern_stream() throws IOException {
return PatternStreamWordFrequency.frequencies(FILE_NAME);
}
private void sanityCheck(Map<String, Long> val1, Map<String, Long> val2, Map<String, Long> val3) {
if (val1.isEmpty()
|| val2.isEmpty()
|| val3.isEmpty()
|| !val1.equals(val2)
|| !val2.equals(val3)) {
throw new AssertionError("Word frequencies do not match as expected.");
}
}
}