Java List Print printPerformanceStats(String message, List iterationTimesInNanoseconds)

Description

print Performance Stats

License

Apache License

Declaration

public static void printPerformanceStats(String message, List<Long> iterationTimesInNanoseconds) 

Method Source Code

//package com.java2s;
/*/*w w  w.ja va  2s.com*/
 * Copyright 2011-2015 B2i Healthcare Pte Ltd, http://b2i.sg
 * 
 * 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.
 */

import java.util.Collection;
import java.util.Collections;
import java.util.List;

public class Main {
    public static void printPerformanceStats(String message, List<Long> iterationTimesInNanoseconds) {
        Long max = Collections.max(iterationTimesInNanoseconds);
        Long min = Collections.min(iterationTimesInNanoseconds);

        System.out.format("%s: totalIterations=%d, min=%d us, max=%d us, avg=%d us.\n", message,
                iterationTimesInNanoseconds.size(), min / 1000, max / 1000,
                average(iterationTimesInNanoseconds) / 1000);
    }

    private static long average(Collection<Long> values) {
        long avg = 0;
        for (Long value : values) {
            avg += value;
        }
        return avg / values.size();
    }
}

Related

1. printlnList(List list)
2. printMap(HashMap> listHashMap)
3. printNonEmptyList(List list)
4. printObjectList(List