code: /*
   * #%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);
  	}
  	
  
  }
  