计算程序用时

针对批量日志文件，如下统计系统用时：

**$cat filter.09565C.8435534.o

Start Time:
Tue Feb 8 20:42:58 CST 2022
End Time:
Tue Feb 8 21:06:12 CST 2022**

for i in `ls`
do
start=`cat $i | grep CST| head -n 1`;
end=`cat $i | grep CST| tail -n 1`;
data1=`date -d "$start" +"%s"`
data2=`date -d "$end" +"%s"`
time=$(($(($data2-$data1))/60))
echo $time
done