package com.javadaemon.skrollr.test;

import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;

public class ListSpeedTest {

    public static double testList(List<Integer> list, int testAmount, int testTries) {
        ArrayList<Long> results = new ArrayList<Long>();
        addToList(list, testAmount);
        for(int counter = 0; counter < testTries; counter++) {
            long beforeTime = System.nanoTime();
            for (Integer e : list) {
                int integer = e.intValue();
            }
            long afterTime = System.nanoTime();
            long timeSpent = afterTime - beforeTime;

            results.add(new Long(timeSpent));
        }
        long sum = 0;
        for (Long e : results) {
            sum += e;
        }
        return sum/results.size();
    }

    public static void addToList(List<Integer> list, int amount) {
        for(int counter = 0; counter < amount; counter++) {
            list.add(new Integer(counter));
        }
    }

    public static void main(String[] args) {
        ArrayList<Integer> arrayList = new ArrayList<Integer>();
        LinkedList<Integer> linkedList = new LinkedList<Integer>();

        double arrayTest = testList(arrayList, 1000000, 10);
        double linkedTest = testList(linkedList, 1000000, 10);
        System.out.println("arrayTest avarage: "+arrayTest);
        System.out.println("linkedTest avarage: "+linkedTest);
    }
}