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CollectorJoiningTest.java
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CollectorJoiningTest.java
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/*
* Copyright (c) 2024 Goldman Sachs and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Eclipse Distribution License v. 1.0 which accompany this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*/
package org.eclipse.collections.impl.jmh;
import java.util.Collections;
import java.util.List;
import java.util.Random;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.eclipse.collections.api.list.MutableList;
import org.eclipse.collections.api.list.primitive.IntList;
import org.eclipse.collections.impl.jmh.runner.AbstractJMHTestRunner;
import org.eclipse.collections.impl.list.mutable.FastList;
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.TearDown;
import org.openjdk.jmh.annotations.Warmup;
@State(Scope.Thread)
@BenchmarkMode(Mode.Throughput)
@OutputTimeUnit(TimeUnit.SECONDS)
@Fork(2)
@Warmup(iterations = 10, time = 2)
@Measurement(iterations = 10, time = 2)
public class CollectorJoiningTest
{
private static final int SIZE = 25;
private static final int BATCH_SIZE = 5;
private static final Stream<Integer> INTEGERS = new Random().ints(0, 10_000).boxed();
private final List<Integer> integersJDK = INTEGERS.limit(SIZE).collect(Collectors.toList());
private final MutableList<Integer> integersEC = FastList.newListWith(this.integersJDK.toArray(new Integer[SIZE]));
private final IntList intList = this.integersEC.collectInt(Integer::intValue);
private ExecutorService executorService;
@Setup
public void setUp()
{
this.executorService = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
Collections.shuffle(this.integersJDK);
Collections.shuffle(this.integersEC);
}
@TearDown
public void tearDown() throws InterruptedException
{
this.executorService.shutdownNow();
this.executorService.awaitTermination(1L, TimeUnit.SECONDS);
}
@Benchmark
public String serial_lazy_mapToStringJoining_jdk()
{
return this.integersJDK.stream().map(Object::toString).collect(Collectors.joining(","));
}
@Benchmark
public String serial_lazy_mapToStringJoining_ec()
{
return this.integersEC.stream().map(Object::toString).collect(Collectors.joining(","));
}
@Benchmark
public String parallel_lazy_mapToStringJoining_jdk()
{
return this.integersJDK.parallelStream().map(Object::toString).collect(Collectors.joining(","));
}
@Benchmark
public String parallel_lazy_mapToStringJoining_ec()
{
return this.integersEC.parallelStream().map(Object::toString).collect(Collectors.joining(","));
}
@Benchmark
public String serial_eager_collectToStringJoining_ec()
{
return this.integersEC.collect(Object::toString).reduceInPlace(Collectors.joining(","));
}
@Benchmark
public String serial_lazy_collectToStringJoining_ec()
{
return this.integersEC.asLazy().collect(Object::toString).reduceInPlace(Collectors.joining(","));
}
@Benchmark
public String serial_eager_makeString_ec()
{
return this.integersEC.makeString(",");
}
@Benchmark
public String parallel_lazy_makeString_ec()
{
return this.integersEC.asParallel(this.executorService, BATCH_SIZE).makeString(",");
}
@Benchmark
public String serial_eager_primitiveMakeString_ec()
{
return this.intList.makeString(",");
}
}