/*
* Copyright 2015 Goldman Sachs.
*
* 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.gs.collections.impl.jmh;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;
import com.gs.collections.api.list.MutableList;
import com.gs.collections.api.partition.PartitionIterable;
import com.gs.collections.api.partition.list.PartitionMutableList;
import com.gs.collections.impl.jmh.runner.AbstractJMHTestRunner;
import com.gs.collections.impl.list.Interval;
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 PartitionTest extends AbstractJMHTestRunner
{
private static final int SIZE = 1_000_000;
private final List<Integer> integersJDK = new ArrayList<>(Interval.oneTo(SIZE));
private final MutableList<Integer> integersGSC = Interval.oneTo(SIZE).toList();
@Benchmark
public Map<Boolean, List<Integer>> serial_lazy_jdk()
{
return this.integersJDK.stream().collect(Collectors.partitioningBy(each -> each % 2 == 0));
}
@Benchmark
public Map<Boolean, List<Integer>> serial_lazy_streams_gsc()
{
return this.integersGSC.stream().collect(Collectors.partitioningBy(each -> each % 2 == 0));
}
@Benchmark
public PartitionMutableList<Integer> serial_eager_gsc()
{
return this.integersGSC.partition(each -> each % 2 == 0);
}
@Benchmark
public PartitionIterable<Integer> serial_lazy_gsc()
{
return this.integersGSC.asLazy().partition(each -> each % 2 == 0);
}
}