扫链接速度慢,该怎么解决

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.SocketTimeoutException;
import java.net.URL;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;

public class BookmarkChecker {

    public static void main(final java.lang.String[] args) throws Exception {
        BlockingQueue<URL> urls = new LinkedBlockingQueue<URL>();
        String [] d=readFileByLines("C:/Documents and Settings/Owner/桌面/xx.txt");
        for (int i=0;i<d.length-2;i++){
             if(d[i]!=null){
            urls.put(new URL(d[i]));
             }else{
                 break;
             }
            }
    
      for(int i=0;i<100;i++)
        new Thread( new CheckURLWorker(Thread.currentThread().getName(),urls)).start();
      
    }
    public static String[] readFileByLines(String fileName){
           File file = new File(fileName);
           String [] kk=new String[50000];
           BufferedReader reader = null;
           try {
          //  System.out.println("以行为单位读取文件内容，一次读一整行：");
            reader = new BufferedReader(new FileReader(file));
            String tempString = null;
            int line = 1;
            //一次读入一行，直到读入null为文件结束
            while ((tempString = reader.readLine()) != null){
             //显示行号
         //    System.out.println("line " + line + ": " + tempString);
             kk[line]=tempString;
             line++;
            }
            reader.close();
           } catch (IOException e) {
            e.printStackTrace();
           } finally {
            if (reader != null){
             try {
              reader.close();
             } catch (IOException e1) {
             }
            }
           }
           return kk;



}

    private static class CheckURLWorker implements Runnable {
        private BlockingQueue<URL> queue;
        private String name;
        public CheckURLWorker(String name,BlockingQueue<URL> q){
            this.name = name;
            this.queue = q;
        }

        public void run() {
            for (URL url = queue.poll(); url != null; url = queue.poll()) {
                try{
                    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                    connection.setConnectTimeout(5000)；
                   connection.setReadTimeout(13000);
                    connection.setRequestMethod("GET");
                    connection.connect();
                    int code = connection.getResponseCode();
                    connection.disconnect();
                    System.out.printf("[%s]%s:%d%n",name,url.toString(),code);
                } catch (SocketTimeoutException e) {
                    System.out.printf("[%s]%s:%d%n",name,url.toString(),-1);
                } catch (IOException e) {
                    System.err.println(e);
                }
            }
        }
    }
}