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RejectTest.java
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RejectTest.java
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/*
* Copyright (c) 2015 Goldman Sachs.
* 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.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.function.Predicate;
import java.util.stream.Collectors;
import org.eclipse.collections.api.list.MutableList;
import org.eclipse.collections.impl.block.factory.Predicates;
import org.eclipse.collections.impl.jmh.runner.AbstractJMHTestRunner;
import org.eclipse.collections.impl.list.Interval;
import org.junit.Assert;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.State;
@State(Scope.Thread)
@BenchmarkMode(Mode.Throughput)
@OutputTimeUnit(TimeUnit.SECONDS)
public class RejectTest extends AbstractJMHTestRunner
{
private static final int SIZE = 1_000_000;
private final List<Integer> integersJDK = new ArrayList<>(Interval.oneTo(SIZE));
private final MutableList<Integer> integersEC = Interval.oneTo(SIZE).toList();
@Benchmark
public void serial_lazy_jdk_lambda_not()
{
List<Integer> evens = this.integersJDK.stream().filter(each -> each % 2 != 1).collect(Collectors.toList());
List<Integer> odds = this.integersJDK.stream().filter(each -> each % 2 != 0).collect(Collectors.toList());
Assert.assertEquals(SIZE / 2, evens.size());
Assert.assertEquals(SIZE / 2, odds.size());
}
@Benchmark
public void serial_lazy_streams_ec_lambda_not()
{
List<Integer> evens = this.integersEC.stream().filter(each -> each % 2 != 1).collect(Collectors.toList());
List<Integer> odds = this.integersEC.stream().filter(each -> each % 2 != 0).collect(Collectors.toList());
Assert.assertEquals(SIZE / 2, evens.size());
Assert.assertEquals(SIZE / 2, odds.size());
}
@Benchmark
public void serial_lazy_jdk_lambda_negate()
{
Predicate<Integer> predicate1 = each -> each % 2 == 1;
List<Integer> evens = this.integersJDK.stream().filter(predicate1.negate()).collect(Collectors.toList());
Predicate<Integer> predicate2 = each -> each % 2 == 0;
List<Integer> odds = this.integersJDK.stream().filter(predicate2.negate()).collect(Collectors.toList());
Assert.assertEquals(SIZE / 2, evens.size());
Assert.assertEquals(SIZE / 2, odds.size());
}
@Benchmark
public void serial_lazy_streams_ec_lambda_negate()
{
Predicate<Integer> predicate1 = each -> each % 2 == 1;
List<Integer> evens = this.integersEC.stream().filter(predicate1.negate()).collect(Collectors.toList());
Predicate<Integer> predicate2 = each -> each % 2 == 0;
List<Integer> odds = this.integersEC.stream().filter(predicate2.negate()).collect(Collectors.toList());
Assert.assertEquals(SIZE / 2, evens.size());
Assert.assertEquals(SIZE / 2, odds.size());
}
@Benchmark
public void serial_eager_ec_select_predicates_not()
{
MutableList<Integer> evens = this.integersEC.select(Predicates.not(each -> each % 2 == 1));
MutableList<Integer> odds = this.integersEC.select(Predicates.not(each -> each % 2 == 0));
Assert.assertEquals(SIZE / 2, evens.size());
Assert.assertEquals(SIZE / 2, odds.size());
}
@Benchmark
public void serial_eager_ec()
{
MutableList<Integer> evens = this.integersEC.reject(each -> each % 2 == 1);
MutableList<Integer> odds = this.integersEC.reject(each -> each % 2 == 0);
Assert.assertEquals(SIZE / 2, evens.size());
Assert.assertEquals(SIZE / 2, odds.size());
}
@Benchmark
public void serial_lazy_ec()
{
MutableList<Integer> evens = this.integersEC.asLazy().reject(each -> each % 2 == 1).toList();
MutableList<Integer> odds = this.integersEC.asLazy().reject(each -> each % 2 == 0).toList();
Assert.assertEquals(SIZE / 2, evens.size());
Assert.assertEquals(SIZE / 2, odds.size());
}
}