cURL command to check the request timing (including TTFB)

ttfb.sh

#!/bin/bash
# file: ttfb.sh
# curl command to check the time to first byte
# ** usage **
# 1. ./ttfb.sh "https://google.com"
# 2. seq 10 | xargs -Iz ./ttfb.sh "https://google.com"

curl -o /dev/null \
     -H 'Cache-Control: no-cache' \
     -s \
     -w "DNS lookup:\t\t%{time_namelookup} seconds\nConnect:\t\t%{time_connect} seconds\nApp Connect:\t\t%{time_appconnect} seconds\nPretransfer:\t\t%{time_pretransfer} seconds\nStart transfer (TTFB):\t%{time_starttransfer} seconds\nTotal:\t\t\t%{time_total} seconds\nSize:\t\t\t%{size_download} bytes\n" \
     $1