用法及返回结果如下：
[root@myserver01 tmp]# sh test_web.sh -n500 http://www.baidu.com Request url: http://www.baidu.com Request number: 500 Request Failed: 0 ------Average Value------ time_connect: 0.014414 time_namelookup: 0.010926 time_total: 0.020486 -------------------------
请求参数：
-n 指定发送多少次请求，默认为10
返回结果为 curl -w 选项返回值，以下摘自curl官方文档（http://curl.haxx.se/docs/manpage.html）：
time_connect ：连接时间,从开始到建立TCP连接完成所用时间,包括前边DNS解析时间，如果需要单纯的得到连接时间，用这个time_connect时间减去前边time_namelookup时间。(The time, in seconds, it took from the start until the TCP connect to the remote host (or proxy) was completed.)
time_namelookup： DNS解析时间,从请求开始到DNS解析完毕所用时间。(The time, in seconds, it took from the start until the name resolving was completed.)
time_total： 总时间，按秒计。精确到小数点后三位。 （The total time, in seconds, that the full operation lasted. The time will be displayed with millisecond resolution.）
代码如下（可自行添加其他功能）：
#!/bin/bash #requesturl.sh usage=" Usage: $0 [options...] <url>\n Options:\n -h This help text\n -n <num> The numbers to request\n " if [ $# -lt 1 ] then echo -e $usage exit 1 fi num=10 while getopts "n:h" arg do case $arg in n) num=$OPTARG if [ $num -lt 1 ] then num=1 fi ;; h) echo -e $usage exit 1 ;; ?) echo "Unknow argument" exit 1 ;; esac done url=$(eval echo "\$$#") if [ "http://" != ${url:0:7} ] then echo "The url need to add the http:// prefix" exit 1 fi echo "Request url: "$url echo "Request number: "$num i=1 while [ $i -le $num ] do c=`curl -o /dev/null -s -w "http_code:%{http_code} time_namelookup:%{time_namelookup} \ time_connect:%{time_connect} time_total:%{time_total}" $url` s=$s$c"\n" i=$[$i+1] done #echo -e $s echo -e $s | awk ‘{OFS="\n"}{if($1) for(i=1;i<=NF;i++)print $i}‘ | awk -F: -v num=$num -v failnum=0 ‘{if($1 != "http_code")result[$1]+=$2;if($1=="http_code" && $2 != 200)failnum++} \ END{print "Request Failed: " failnum "\n------Average Value------"; for(i in result) {print i ": " result[i]/num;} print "-------------------------"}‘
（转自：http://renxiangzyq.iteye.com/blog/782773）
（转，有改动）测试网页响应时间的shell脚本[需要curl支持]
原文：http://www.cnblogs.com/vijayfly/p/6236341.html