/*
* Copyright (C) 2012 The Guava Authors
*
* 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.google.common.collect;
import com.google.caliper.Param;
import com.google.caliper.Runner;
import com.google.caliper.SimpleBenchmark;
import com.google.common.collect.BenchmarkHelpers.SetImpl;
/**
* This is meant to be used with {@code --measureMemory} to measure the memory
* usage of various {@code Set} implementations.
*
* @author Christopher Swenson
*/
public class SetCreationBenchmark extends SimpleBenchmark {
@Param({ "3", "6", "11", "23", "45", "91", "181", "362", "724", "1448",
"2896", "5793", "11585", "23170", "46341", "92682", "185364", "370728",
"741455", "1482910", "2965821", "5931642"})
private int size;
// "" means no fixed seed
@Param("1234")
private SpecialRandom random;
@Param({"Immutable", "Hash"})
private SetImpl impl;
// the following must be set during setUp
private CollectionBenchmarkSampleData sampleData;
@Override public void setUp() {
sampleData = new CollectionBenchmarkSampleData(true, random, 0.8, size);
}
public int timeCreation(int reps) {
int x = 0;
for (int i = 0; i < reps; i++) {
x ^= System.identityHashCode(impl.create(sampleData.getValuesInSet()));
}
return x;
}
public static void main(String[] args) throws Exception {
Runner.main(SetCreationBenchmark.class, args);
}
}