curl 测速

curl -o /dev/null -s -w 'DNS:%{time_namelookup}\nConnect:%{time_connect}\nStart:%{time_starttransfer}\nTotal:%{time_total}\nSpeed:%{speed_download} byte/s' https://xxx.com/

返回结果:
DNS:0.030
Connect:0.078
Start:0.503
Total:0.515
Speed:60306.000 byte/s