可以使用Firefox的Firebug插件查看网站的响应时间，今天我们用python实现这个功能。
#!/usr/bin/env python
#coding=utf8#Author zhaodongimport os,sys import time import sys import pycurl URL=sys.argv[1]#uURL="http://www.baidu.com" c = pycurl.Curl() c.setopt(pycurl.URL, URL) #连接超时时间,5秒 c.setopt(pycurl.CONNECTTIMEOUT, 5) #下载超时时间,5秒 c.setopt(pycurl.TIMEOUT, 5) c.setopt(pycurl.FORBID_REUSE, 1) c.setopt(pycurl.MAXREDIRS, 1) c.setopt(pycurl.NOPROGRESS, 1) c.setopt(pycurl.DNS_CACHE_TIMEOUT,30)indexfile = open(os.path.dirname(os.path.realpath(__file__))+"/content.txt", "wb")c.setopt(pycurl.WRITEHEADER, indexfile)c.setopt(pycurl.WRITEDATA, indexfile)try: c.perform()except Exception,e: print "connecion error:"+str(e) indexfile.close() c.close() sys.exit() NAMELOOKUP_TIME = c.getinfo(c.NAMELOOKUP_TIME) #DNS解析时间 CONNECT_TIME = c.getinfo(c.CONNECT_TIME) #获取建立连接时间PRETRANSFER_TIME = c.getinfo(c.PRETRANSFER_TIME)STARTTRANSFER_TIME = c.getinfo(c.STARTTRANSFER_TIME)TOTAL_TIME = c.getinfo(c.TOTAL_TIME)HTTP_CODE = c.getinfo(c.HTTP_CODE)SIZE_DOWNLOAD = c.getinfo(c.SIZE_DOWNLOAD)HEADER_SIZE = c.getinfo(c.HEADER_SIZE)SPEED_DOWNLOAD=c.getinfo(c.SPEED_DOWNLOAD)print "HTTP状态码：%s" %(HTTP_CODE)print "DNS解析时间：%.2f ms"%(NAMELOOKUP_TIME*1000)print "建立连接时间：%.2f ms" %(CONNECT_TIME*1000)print "准备传输时间：%.2f ms" %(PRETRANSFER_TIME*1000)print "传输开始时间：%.2f ms" %(STARTTRANSFER_TIME*1000)print "传输结束总时间：%.2f ms" %(TOTAL_TIME*1000)print "下载数据包大小：%d bytes/s" %(SIZE_DOWNLOAD)print "HTTP头部大小：%d byte" %(HEADER_SIZE)print "平均下载速度：%d bytes/s" %(SPEED_DOWNLOAD)indexfile.close()c.close()使用：
#python web.py www.baidu.com
