学步园

废话不多说，原因不解释，上测试代码：

package com.letv.cloud.cdn.jtest;

import java.io.IOException;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.TimeUnit;

import org.slf4j.LoggerFactory;

import com.google.common.base.Stopwatch;

public class JtestMain {
	
	private final static org.slf4j.Logger LOGGER = LoggerFactory.getLogger("JtestMain");
	
	private static Stopwatch stopWatch = new Stopwatch();

	public static void testList(int num){
		List<String> aList = new ArrayList<String>();
		List<String> lList = new LinkedList<String>();
		stopWatch.reset();
		stopWatch.start();
		for(int i=0; i<num; i++){
			aList.add("201411180827	cctv5_800	83	796.03	115.182.51.134	123.125.89.75	in	uuid1	5");
		}
		LOGGER.info("insert num:{} ArrayList cost:{} ms",num,stopWatch.elapsedTime(TimeUnit.MILLISECONDS));
		
		stopWatch.reset();
		stopWatch.start();
		for(int i=0; i<num; i++){
			lList.add("201411180827	cctv5_800	83	796.03	115.182.51.134	123.125.89.75	in	uuid1	5");
		}
		LOGGER.info("insert num:{} LinkedList cost:{} ms",num,stopWatch.elapsedTime(TimeUnit.MILLISECONDS));
	}
	
	public static void main(String[] args) throws InterruptedException, IOException {
		int[] nums = {10000,10 * 10000,100 * 10000, 1000 * 10000, 10000 * 10000};
		
		for(int i=0; i<nums.length; i++){
			testList(nums[i]);
		}
	}
}

测试结果：

 INFO [main] (JtestMain.java:65) 11:50:47,480 -- insert num:10000 ArrayList cost:2 ms
 INFO [main] (JtestMain.java:72) 11:50:47,484 -- insert num:10000 LinkedList cost:1 ms
 INFO [main] (JtestMain.java:65) 11:50:47,490 -- insert num:100000 ArrayList cost:5 ms
 INFO [main] (JtestMain.java:72) 11:50:47,495 -- insert num:100000 LinkedList cost:5 ms
 INFO [main] (JtestMain.java:65) 11:50:47,504 -- insert num:1000000 ArrayList cost:8 ms
 INFO [main] (JtestMain.java:72) 11:50:47,515 -- insert num:1000000 LinkedList cost:11 ms
 INFO [main] (JtestMain.java:65) 11:50:47,606 -- insert num:10000000 ArrayList cost:89 ms
 INFO [main] (JtestMain.java:72) 11:50:49,335 -- insert num:10000000 LinkedList cost:1729 ms
 INFO [main] (JtestMain.java:65) 11:50:50,290 -- insert num:100000000 ArrayList cost:954 ms
 INFO [main] (JtestMain.java:72) 11:51:14,263 -- insert num:100000000 LinkedList cost:23973 ms