curl -s -w 'Testing Website Response Time for: %{url_effective}\n\nLookup Time:\t\t%{time_namelookup}\nConnect Time:\t\t%{time_co
nnect}\nPre-transfer Time:\t%{time_pretransfer}\nStart-transfer Time:\t%{time_starttransfer}\n\nTotal Time:\t\t%{time_total}\n' -o /dev/null ADDRESS
https://www.techrepublic.com/article/how-to-test-a-website-loading-speed-using-the-curl-command
time wget --quiet --output-document=/dev/null http://httpbin.org/delay/3
siege --concurrent=1 --delay=0 --time=60s http://httpbin.org/delay/1
siege --concurrent=1 --benchmark --time=60s http://httpbin.org/delay/1
siege --concurrent=1 --reps=1 --benchmark --print "https://httpbin.org/post POST {\"name\":\"John Doe\"}" --content-type "application/json"
siege --concurrent=1 --reps=1 --benchmark --print http://httpbin.org/delay/1
https://www.joedog.org/siege-manual/
ab -n 100 -c 10 http://httpbin.org/anything/