org.simmetrics.performance.MultisetIntersectionSize.java Source code

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Here is the source code for org.simmetrics.performance.MultisetIntersectionSize.java

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/*
 * #%L
 * Simmetrics Core
 * %%
 * Copyright (C) 2014 - 2016 Simmetrics 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.
 * #L%
 */
package org.simmetrics.performance;

import com.google.caliper.Benchmark;
import com.google.caliper.Param;
import com.google.caliper.runner.CaliperMain;
import com.google.common.collect.HashMultiset;
import com.google.common.collect.Multiset;
import com.google.common.collect.Multisets;

@SuppressWarnings("javadoc")
public class MultisetIntersectionSize {

    enum Value {
        A100(100), A1k(1000), A10k(10 * 1000);

        final Multiset<String> s;

        Value(int n) {
            s = HashMultiset.create(n);
            for (int i = 0; i < n; i++) {
                s.add("sheep" + i);
            }
        }
    }

    @Param
    Value a;

    @Param
    Value b;

    @Benchmark
    float compare(int reps) {

        float dummy = 0;
        for (int i = 0; i < reps; i++) {
            dummy += Multisets.intersection(a.s, b.s).size();
        }
        return dummy;
    }

    public static void main(String[] args) {
        CaliperMain.main(MultisetIntersectionSize.class, args);
    }

}