Check TCP handshake and SSL handshake time cost for a domain

curl -w "TCP handshake: %{time_connect}, SSL handshake: %{time_appconnect}\n" -so /dev/null https://www.wolfram.com

References:

• Jordan Sissel, "SSL handshake latency and HTTPS optimizations," 2010

• 阮一峰, 〈SSL延迟有多大？〉

Download multiple files

curl -O http://www.cs.berkeley.edu/~sinclair/cs271/n[1-3].pdf

References