This is actually quite easy to test. Create a text file called curl-format.txt: time_namelookup: %{time_namelookup}\n time_connect: %{time_connect}

This is actually quite easy to test. Create a text file called curl-format.txt: time_namelookup: %{time_namelookup}\n time_connect: %{time_connect}\n time_appconnect: %{time_appconnect}\n time_pretransfer: %{time_pretransfer}\n time_redirect: %{time_redirect}\n time_starttransfer: %{time_starttransfer}\n ----------\n time_total: %{time_total}\n Now use curl to connect to your website (or any site that supports both HTTP and HTTPS): curl -w "@curl-format.txt" -o /dev/null -s "https://mysite.com" The difference between "time_connect" and "time_appconnect" is the overhead from TLS/SSL. Usually in the ~100ms range. If you connect to the same site via HTTP those two numbers should be identical (or very close).