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/*
* Copyright (C) 2014 The Android Open Source Project
*
* 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 benchmarks.regression;
import com.google.caliper.Param;
import com.google.caliper.SimpleBenchmark;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;
import java.util.Vector;
public class CollectionsBenchmark extends SimpleBenchmark {
@Param({"4", "16", "64", "256", "1024"})
private int arrayListLength;
public void timeSort_arrayList(int nreps) {
List<Integer> input = buildList(arrayListLength, true /* use array list */);
for (int i = 0; i < nreps; ++i) {
Collections.sort(input);
}
}
public void timeSort_vector(int nreps) {
List<Integer> input = buildList(arrayListLength, false /* use array list */);
for (int i = 0; i < nreps; ++i) {
Collections.sort(input);
}
}
private static List<Integer> buildList(int arrayListLength, boolean useArrayList) {
Random random = new Random();
random.setSeed(0);
List<Integer> list = useArrayList ? new ArrayList<Integer>(arrayListLength) :
new Vector<Integer>(arrayListLength);
for (int i = 0; i < arrayListLength; ++i) {
list.add(random.nextInt());
}
return list;
}
}
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