curl 命令的运行时间

Question

我有一个域名文件（~9000 个网址）。我试图确定对所有 url 成功执行卷曲请求所需的时间。

#!/bin/bash

#read lines from file. 
while read -r line || [[ -n "$line" ]]; do

#Start execution time. 
start=`date +%s.%N`

curl -k -L $line

if (("$?" != "7")) || (("$?" != "6")) ||(("$?" != "35")) ; then  

#If curl request is not one of these [error codes][1] then end execution time
    end=`date +%s.%N`
fi
runtime=$( echo "$end - $start" | bc -l ) >> throughput.txt

#Can do an average on the file later. 


done < urls.txt

由于某种原因，循环在读取第一个网址后停止。有人可以帮助我正确运行脚本吗？